118-474: Northparkes is a copper and gold mine in central New South Wales , Australia, approximately 27 kilometres north-northwest of the town of Parkes . The mine was originally started in 1994 using open pit mining , with underground mining using the block caving method starting in 1997. The mine has an operational capacity to process six million tonnes of ore per year, containing roughly 60,000 tonnes of copper and 50,000 ounces of gold. Economic viability of
236-579: A Gilman reagent . These can undergo substitution with alkyl halides to form coupling products ; as such, they are important in the field of organic synthesis . Copper(I) acetylide is highly shock-sensitive but is an intermediate in reactions such as the Cadiot–Chodkiewicz coupling and the Sonogashira coupling . Conjugate addition to enones and carbocupration of alkynes can also be achieved with organocopper compounds. Copper(I) forms
354-522: A coup d'état in Cyprus, to unite the island with Greece . The coup ousted president Makarios III and replaced him with pro- enosis nationalist Nikos Sampson . In response to the coup, five days later, on 20 July 1974, the Turkish army invaded the island, citing a right to intervene to restore the constitutional order from the 1960 Treaty of Guarantee . This justification has been rejected by
472-696: A covalent character and are relatively weak. This observation explains the low hardness and high ductility of single crystals of copper. At the macroscopic scale, introduction of extended defects to the crystal lattice , such as grain boundaries, hinders flow of the material under applied stress, thereby increasing its hardness. For this reason, copper is usually supplied in a fine-grained polycrystalline form, which has greater strength than monocrystalline forms. The softness of copper partly explains its high electrical conductivity ( 59.6 × 10 S /m ) and high thermal conductivity, second highest (second only to silver) among pure metals at room temperature. This
590-643: A nickel ) consists of 75% copper and 25% nickel in homogeneous composition. Prior to the introduction of cupronickel, which was widely adopted by countries in the latter half of the 20th century, alloys of copper and silver were also used, with the United States using an alloy of 90% silver and 10% copper until 1965, when circulating silver was removed from all coins with the exception of the half dollar—these were debased to an alloy of 40% silver and 60% copper between 1965 and 1970. The alloy of 90% copper and 10% nickel, remarkable for its resistance to corrosion,
708-407: A pinkish-orange color . Copper is used as a conductor of heat and electricity, as a building material , and as a constituent of various metal alloys , such as sterling silver used in jewelry , cupronickel used to make marine hardware and coins , and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in
826-425: A spin of 3 ⁄ 2 . The other isotopes are radioactive , with the most stable being Cu with a half-life of 61.83 hours. Seven metastable isomers have been characterized; Cu is the longest-lived with a half-life of 3.8 minutes. Isotopes with a mass number above 64 decay by β , whereas those with a mass number below 64 decay by β . Cu , which has
944-583: A Cypriot king is Kushmeshusha , as appears on letters sent to Ugarit in the 13th century BC. At the end of the Bronze Age, the island experienced two waves of Greek settlement. The first wave consisted of Mycenaean Greek traders, who started visiting Cyprus around 1400 BC. A major wave of Greek settlement is believed to have taken place following the Late Bronze Age collapse of Mycenaean Greece from 1100 to 1050 BC, with
1062-399: A blast furnace. A potential source of copper is polymetallic nodules, which have an estimated concentration 1.3%. Like aluminium , copper is recyclable without any loss of quality, both from raw state and from manufactured products. In volume, copper is the third most recycled metal after iron and aluminium. An estimated 80% of all copper ever mined is still in use today. According to
1180-464: A blue crystalline penta hydrate , the most familiar copper compound in the laboratory. It is used in a fungicide called the Bordeaux mixture . Polyols , compounds containing more than one alcohol functional group , generally interact with cupric salts. For example, copper salts are used to test for reducing sugars . Specifically, using Benedict's reagent and Fehling's solution the presence of
1298-732: A ceasefire had been agreed, Turkey had landed 30,000 troops on the island and captured Kyrenia, the corridor linking Kyrenia to Nicosia, and the Turkish Cypriot quarter of Nicosia itself. The junta in Athens , and then the Sampson regime in Cyprus fell from power. In Nicosia, Glafkos Clerides temporarily assumed the presidency. But after the peace negotiations in Geneva , the Turkish government reinforced their Kyrenia bridgehead and started
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#17327974847331416-709: A directly usable metallic form ( native metals ). This led to very early human use in several regions, from c. 8000 BC . Thousands of years later, it was the first metal to be smelted from sulfide ores, c. 5000 BC ; the first metal to be cast into a shape in a mold, c. 4000 BC ; and the first metal to be purposely alloyed with another metal, tin , to create bronze , c. 3500 BC . Commonly encountered compounds are copper(II) salts, which often impart blue or green colors to such minerals as azurite , malachite , and turquoise , and have been used widely and historically as pigments. Copper used in buildings, usually for roofing, oxidizes to form
1534-485: A few thousand years later. During the late Bronze Age , Cyprus, known in contemporary sources as Alashiya , developed an urbanised society closely connected to the wider Mediterranean world. Cyprus experienced waves of settlement by Mycenaean Greeks at the end of the 2nd millennium BC . It was subsequently occupied by several major powers , including the empires of the Assyrians , Egyptians and Persians , from whom
1652-630: A golden “opportunity” in achieving enosis with Cyprus. Alternatively it was a “lost opportunity” when the Zaimis administration declined the British proposal. In 1923, under the Treaty of Lausanne , the nascent Turkish republic relinquished any claim to Cyprus, and in 1925 it was declared a British crown colony . During the Second World War , many Greek and Turkish Cypriots enlisted in
1770-457: A green patina of compounds called verdigris . Copper is sometimes used in decorative art , both in its elemental metal form and in compounds as pigments. Copper compounds are used as bacteriostatic agents , fungicides , and wood preservatives . Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c oxidase . In molluscs and crustaceans , copper
1888-505: A half-life of 12.7 hours, decays both ways. Cu and Cu have significant applications. Cu is used in Cu Cu-PTSM as a radioactive tracer for positron emission tomography . Copper is produced in massive stars and is present in the Earth's crust in a proportion of about 50 parts per million (ppm). In nature, copper occurs in
2006-720: A key military base for its colonial routes. By 1906, when the Famagusta harbour was completed, Cyprus was a strategic naval outpost overlooking the Suez Canal , the crucial main route to India which was then Britain's most important overseas possession. Following the outbreak of the First World War and the decision of the Ottoman Empire to join the war on the side of the Central Powers , on 5 November 1914
2124-687: A layer of brown-black copper oxide which, unlike the rust that forms on iron in moist air, protects the underlying metal from further corrosion ( passivation ). A green layer of verdigris (copper carbonate) can often be seen on old copper structures, such as the roofing of many older buildings and the Statue of Liberty . Copper tarnishes when exposed to some sulfur compounds, with which it reacts to form various copper sulfides . There are 29 isotopes of copper. Cu and Cu are stable, with Cu comprising approximately 69% of naturally occurring copper; both have
2242-691: A member of the European Union . After the restoration of constitutional order and the return of Archbishop Makarios III to Cyprus in December 1974, Turkish troops remained, occupying the northeastern portion of the island. In 1983, the Turkish Cypriot parliament , led by the Turkish Cypriot leader Rauf Denktaş , proclaimed the Turkish Republic of Northern Cyprus (TRNC), which is recognised only by Turkey. The events of
2360-733: A member of the Byzantine imperial family, took over Cyprus and declared it independent of the Empire. In 1191, during the Third Crusade , Richard I of England captured the island from Isaac. He used it as a major supply base that was relatively safe from the Saracens . A year later Richard sold the island to the Knights Templar , who, following a bloody revolt, in turn sold it to Guy of Lusignan . His brother and successor Aimery
2478-532: A natural color other than gray or silver. Pure copper is orange-red and acquires a reddish tarnish when exposed to air. This is due to the low plasma frequency of the metal, which lies in the red part of the visible spectrum, causing it to absorb the higher-frequency green and blue colors. As with other metals, if copper is put in contact with another metal in the presence of an electrolyte , galvanic corrosion will occur. Copper does not react with water, but it does slowly react with atmospheric oxygen to form
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#17327974847332596-551: A personal name ) are also used, though less frequently. The state's official name in Greek literally translates to "Cypriot Republic" in English, but this translation is not used officially; "Republic of Cyprus" is used instead. Hunter-gatherers first arrived on Cyprus around 13–12,000 years ago (11,000 to 10,000 BC), based on dating of sites like Aetokremnos on the south coast and the inland site of Vretsia Roudias. The arrival of
2714-407: A red-brown precipitate with copper(II) salts. Compounds that contain a carbon-copper bond are known as organocopper compounds. They are very reactive towards oxygen to form copper(I) oxide and have many uses in chemistry . They are synthesized by treating copper(I) compounds with Grignard reagents , terminal alkynes or organolithium reagents ; in particular, the last reaction described produces
2832-721: A reversal from the days of Latin rule, the head of the Church of Cyprus was invested as leader of the Greek Cypriot population and acted as mediator between Christian Greek Cypriots and the Ottoman authorities. This status ensured that the Church of Cyprus was in a position to end the constant encroachments of the Roman Catholic Church. Ottoman rule of Cyprus was at times indifferent, at times oppressive, depending on
2950-451: A rich variety of compounds, usually with oxidation states +1 and +2, which are often called cuprous and cupric , respectively. Copper compounds promote or catalyse numerous chemical and biological processes. As with other elements, the simplest compounds of copper are binary compounds, i.e. those containing only two elements, the principal examples being oxides, sulfides, and halides . Both cuprous and cupric oxides are known. Among
3068-575: A second invasion on 14 August. The invasion resulted in Morphou , Karpass , Famagusta and the Mesaoria coming under Turkish control. International pressure led to a ceasefire, and by then 36% of the island had been taken over by the Turks and 180,000 Greek Cypriots had been evicted from their homes in the north. At the same time, around 50,000 Turkish Cypriots were displaced to the north and settled in
3186-424: A variety of minerals, including native copper , copper sulfides such as chalcopyrite , bornite , digenite , covellite , and chalcocite , copper sulfosalts such as tetrahedite-tennantite , and enargite , copper carbonates such as azurite and malachite , and as copper(I) or copper(II) oxides such as cuprite and tenorite , respectively. The largest mass of elemental copper discovered weighed 420 tonnes and
3304-436: A variety of weak complexes with alkenes and carbon monoxide , especially in the presence of amine ligands. Copper(III) is most often found in oxides. A simple example is potassium cuprate , KCuO 2 , a blue-black solid. The most extensively studied copper(III) compounds are the cuprate superconductors . Yttrium barium copper oxide (YBa 2 Cu 3 O 7 ) consists of both Cu(II) and Cu(III) centres. Like oxide, fluoride
3422-583: Is a constituent of the blood pigment hemocyanin , replaced by the iron-complexed hemoglobin in fish and other vertebrates . In humans, copper is found mainly in the liver, muscle, and bone. The adult body contains between 1.4 and 2.1 mg of copper per kilogram of body weight. In the Roman era , copper was mined principally on Cyprus , the origin of the name of the metal, from aes cyprium (metal of Cyprus), later corrupted to cuprum (Latin). Coper ( Old English ) and copper were derived from this,
3540-405: Is a highly basic anion and is known to stabilize metal ions in high oxidation states. Both copper(III) and even copper(IV) fluorides are known, K 3 CuF 6 and Cs 2 CuF 6 , respectively. Some copper proteins form oxo complexes , which, in extensively studied synthetic analog systems, feature copper(III). With tetrapeptides , purple-colored copper(III) complexes are stabilized by
3658-572: Is an indication that the Cypriots were ruling the island with directly regulated relations with the Great King and there was not a Persian satrap . The Kingdoms of Cyprus enjoyed special privileges and a semi-autonomous status, but they were still considered vassal subjects of the Great King. The island was conquered by Alexander the Great in 333 BC and Cypriot navy helped Alexander during
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3776-401: Is because the resistivity to electron transport in metals at room temperature originates primarily from scattering of electrons on thermal vibrations of the lattice, which are relatively weak in a soft metal. The maximum possible current density of copper in open air is approximately 3.1 × 10 A/m , above which it begins to heat excessively. Copper is one of a few metallic elements with
3894-532: Is east of Greece , north of Egypt , south of Turkey , and west of Lebanon and Syria . Its capital and largest city is Nicosia . Cyprus also shares land borders with Akrotiri and Dhekelia , a dependent territory of the United Kingdom . The northeast portion of the island is de facto governed by the self-declared Turkish Republic of Northern Cyprus . Cyprus was first settled by hunter-gatherers around 13,000 years ago, with farming settlements emerging
4012-524: Is estimated to be 9,500 years old (7500 BC), predating ancient Egyptian civilisation and pushing back the earliest known feline-human association significantly. The remarkably well-preserved Neolithic village of Khirokitia is a UNESCO World Heritage Site , dating to approximately 6800 BC. During the Late Bronze Age , from around 1650 BC Cyprus (identified in whole or part as Alashiya in contemporary texts) became more connected to
4130-533: Is melted in a furnace and then reduced and cast into billets and ingots ; lower-purity scrap is refined by electroplating in a bath of sulfuric acid . The environmental cost of copper mining was estimated at 3.7 kg CO2eq per kg of copper in 2019. Codelco, a major producer in Chile, reported that in 2020 the company emitted 2.8t CO2eq per ton (2.8 kg CO2eq per kg) of fine copper. Greenhouse gas emissions primarily arise from electricity consumed by
4248-444: Is one of the most important constituents of silver and karat gold solders used in the jewelry industry, modifying the color, hardness and melting point of the resulting alloys. Some lead-free solders consist of tin alloyed with a small proportion of copper and other metals. The alloy of copper and nickel , called cupronickel , is used in low-denomination coins, often for the outer cladding. The US five-cent coin (currently called
4366-437: Is recovered from mine tailings and heaps. A variety of methods are used including leaching with sulfuric acid, ammonia, ferric chloride. Biological methods are also used. A significant source of copper is from recycling. Recycling is facilitated because copper is usually deployed in its metallic state. In 2001, a typical automobile contained 20–30 kg of copper. Recycling usually begins with some melting process using
4484-411: Is used for various objects exposed to seawater, though it is vulnerable to the sulfides sometimes found in polluted harbors and estuaries. Alloys of copper with aluminium (about 7%) have a golden color and are used in decorations. Shakudō is a Japanese decorative alloy of copper containing a low percentage of gold, typically 4–10%, that can be patinated to a dark blue or black color. Copper forms
4602-686: The British Geological Survey , in 2005, Chile was the top producer of copper with at least one-third of the world share followed by the United States, Indonesia and Peru. Copper can also be recovered through the in-situ leach process. Several sites in the state of Arizona are considered prime candidates for this method. The amount of copper in use is increasing and the quantity available is barely sufficient to allow all countries to reach developed world levels of usage. An alternative source of copper for collection currently being researched are polymetallic nodules , which are located at
4720-553: The Congress of Berlin , Cyprus was leased to the British Empire which de facto took over its administration in 1878 (though, in terms of sovereignty, Cyprus remained a de jure Ottoman territory until 5 November 1914, together with Egypt and Sudan ) in exchange for guarantees that Britain would use the island as a base to protect the Ottoman Empire against possible Russian aggression. The island would serve Britain as
4838-541: The Cyprus Convention in 1878 and was formally annexed by the UK in 1914. The future of the island became a matter of disagreement between the two prominent ethnic communities, Greek Cypriots and Turkish Cypriots . From the 19th century onwards, the Greek Cypriot population pursued enosis , union with Greece , which became a Greek national policy in the 1950s. The Turkish Cypriot population initially advocated
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4956-600: The Cyprus Regiment . The Greek Cypriot population, meanwhile, had become hopeful that the British administration would lead to enosis . The idea of enosis was historically part of the Megali Idea , a greater political ambition of a Greek state encompassing the territories with large Greek populations in the former Ottoman Empire, including Cyprus and Asia Minor with a capital in Constantinople , and
5074-607: The Great Lakes may have also been mining copper during this time, making it one of the oldest known examples of copper extraction in the world. There is evidence from prehistoric lead pollution from lakes in Michigan that people in the region began mining copper c. 6000 BC . Evidence suggests that utilitarian copper objects fell increasingly out of use in the Old Copper Complex of North America during
5192-553: The International Resource Panel 's Metal Stocks in Society report , the global per capita stock of copper in use in society is 35–55 kg. Much of this is in more-developed countries (140–300 kg per capita) rather than less-developed countries (30–40 kg per capita). The process of recycling copper is roughly the same as is used to extract copper but requires fewer steps. High-purity scrap copper
5310-694: The Ionian cities during the unsuccessful Ionian Revolt in 499 BC against the Achaemenids. The revolt was suppressed, but Cyprus managed to maintain a high degree of autonomy and remained inclined towards the Greek world. During the whole period of the Persian rule, there is a continuity in the reign of the Cypriot kings and during their rebellions they were crushed by Persian rulers from Asia Minor, which
5428-637: The Linobambaki , a crypto-Catholic community that arose due to religious persecution of the Catholic community by the Ottoman authorities; this community would assimilate into the Turkish Cypriot community during British rule. As soon as the Greek War of Independence broke out in 1821, several Greek Cypriots left for Greece to join the Greek forces. In response, the Ottoman governor of Cyprus arrested and executed 486 prominent Greek Cypriots, including
5546-667: The Neolithic period and the Bronze Age was formerly termed the Chalcolithic period (copper-stone), when copper tools were used with stone tools. The term has gradually fallen out of favor because in some parts of the world, the Chalcolithic and Neolithic are coterminous at both ends. Brass, an alloy of copper and zinc, is of much more recent origin. It was known to the Greeks, but became a significant supplement to bronze during
5664-532: The United Nations and the international community. The Turkish air force began bombing Greek positions in Cyprus, and hundreds of paratroopers were dropped in the area between Nicosia and Kyrenia, where well-armed Turkish Cypriot enclaves had been long-established; while off the Kyrenia coast, Turkish troop ships landed 6,000 men as well as tanks, trucks and armoured vehicles. Three days later, when
5782-525: The Vinča culture date to 4500 BC. Sumerian and Egyptian artifacts of copper and bronze alloys date to 3000 BC. Egyptian Blue , or cuprorivaite (calcium copper silicate) is a synthetic pigment that contains copper and started being used in ancient Egypt around 3250 BC. The manufacturing process of Egyptian blue was known to the Romans, but by the fourth century AD the pigment fell out of use and
5900-741: The Walls of Nicosia , and used it as an important commercial hub. Throughout Venetian rule, the Ottoman Empire frequently raided Cyprus. In 1539 the Ottomans destroyed Limassol and so fearing the worst, the Venetians also fortified Famagusta and Kyrenia . Although the Lusignan French aristocracy remained the dominant social class in Cyprus throughout the medieval period, the former assumption that Greeks were treated only as serfs on
6018-426: The displacement of over 150,000 Greek Cypriots and 50,000 Turkish Cypriots. A separate Turkish Cypriot state in the north was established by unilateral declaration in 1983; the move was widely condemned by the international community , with Turkey alone recognising the new state. These events and the resulting political situation are matters of a continuing dispute . Cyprus is a major tourist destination in
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#17327974847336136-629: The siege of Tyre (332 BC) . The Cypriot fleet was also sent to help Amphoterus . In addition, Alexander had two Cypriot generals Stasander and Stasanor both from the Soli and later both became satraps in Alexander's empire. Following Alexander's death, the division of his empire , and the subsequent Wars of the Diadochi , Cyprus became part of the Hellenistic empire of Ptolemaic Egypt . It
6254-548: The 9th or 10th century AD. Carbon dating has established mining at Alderley Edge in Cheshire , UK, at 2280 to 1890 BC. Ötzi the Iceman , a male dated from 3300 to 3200 BC, was found with an axe with a copper head 99.7% pure; high levels of arsenic in his hair suggest an involvement in copper smelting. Experience with copper has assisted the development of other metals; in particular, copper smelting likely led to
6372-468: The Archbishop of Cyprus, Kyprianos , and four other bishops. In 1828, modern Greece's first president Ioannis Kapodistrias called for union of Cyprus with Greece, and numerous minor uprisings took place. Reaction to Ottoman misrule led to uprisings by both Greek and Turkish Cypriots, although none were successful. After centuries of neglect by the Ottoman Empire, the poverty of most of the people and
6490-636: The British Empire formally annexed Cyprus and declared the Ottoman Khedivate of Egypt and Sudan a Sultanate and British protectorate . In October 1915, Britain offered Cyprus to Greece, ruled by King Constantine I of Greece , on the condition that Greece join the war on the side of the British and went to Serbia ’s assistance, in order to fulfill her Treaty obligations under the Serbo-Greek pact of May 1913. It gave Greece
6608-517: The Bronze Age and a shift towards an increased production of ornamental copper objects occurred. Natural bronze, a type of copper made from ores rich in silicon, arsenic, and (rarely) tin, came into general use in the Balkans around 5500 BC. Alloying copper with tin to make bronze was first practiced about 4000 years after the discovery of copper smelting, and about 2000 years after "natural bronze" had come into general use. Bronze artifacts from
6726-402: The Church of Cyprus organised a referendum under the supervision of clerics and with no Turkish Cypriot participation, where 96% of the participating Greek Cypriots voted in favour of enosis . The Greeks were 80.2% of the total island's population at the time ( census 1946 ). Restricted autonomy under a constitution was proposed by the British administration but eventually rejected. In 1955
6844-674: The EOKA organisation was founded, seeking union with Greece through armed struggle. At the same time the Turkish Resistance Organisation (TMT), calling for Taksim, or partition, was established by the Turkish Cypriots as a counterweight. British officials also tolerated the creation of the Turkish underground organisation TMT The Secretary of State for the Colonies in a letter dated 15 July 1958 had advised
6962-417: The Governor of Cyprus not to act against TMT despite its illegal actions so as not to harm British relations with the Turkish government. During British rule, the future of the island became a matter of disagreement between the two prominent ethnic communities, Greek Cypriots , who made up 77% of the population in 1960, and Turkish Cypriots , who made up 18% of the population. From the 19th century onwards,
7080-568: The Greek Cypriot police. The violence resulted in the death of 364 Turkish and 174 Greek Cypriots, destruction of 109 Turkish Cypriot or mixed villages and displacement of 25,000–30,000 Turkish Cypriots. The crisis resulted in the end of the Turkish Cypriot involvement in the administration and their claiming that it had lost its legitimacy; the nature of this event is still controversial. In some areas, Greek Cypriots prevented Turkish Cypriots from travelling and entering government buildings, while some Turkish Cypriots willingly withdrew due to
7198-405: The Greek Cypriot population pursued enosis , union with Greece , which became a Greek national policy in the 1950s. The Turkish Cypriot population initially advocated the continuation of the British rule, then demanded the annexation of the island to Turkey, and in the 1950s, together with Turkey, established a policy of taksim , the partition of Cyprus and the creation of a Turkish polity in
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#17327974847337316-541: The Mediterranean. The country has an advanced high-income economy . The Republic of Cyprus has been a member of the Commonwealth since 1961 and was a founding member of the Non-Aligned Movement until it joined the European Union on 1 May 2004. On 1 January 2008, Cyprus joined the eurozone . The earliest attested reference to Cyprus is the 15th century BC Mycenaean Greek 𐀓𐀠𐀪𐀍 , ku-pi-ri-jo , meaning "Cypriot" (Greek: Κύπριος ), written in Linear B syllabic script. The classical Greek form of
7434-481: The Middle East; a copper pendant was found in northern Iraq that dates to 8700 BC. Evidence suggests that gold and meteoric iron (but not smelted iron) were the only metals used by humans before copper. The history of copper metallurgy is thought to follow this sequence: first, cold working of native copper, then annealing , smelting , and, finally, lost-wax casting . In southeastern Anatolia , all four of these techniques appear more or less simultaneously at
7552-401: The Roman Empire. Cyprus Cyprus ( / ˈ s aɪ p r ə s / ), officially the Republic of Cyprus , is an island country in the eastern Mediterranean Sea . It is geographically a part of West Asia , but its cultural ties and geopolitics are overwhelmingly Southeast European . Cyprus is the third largest and third-most populous island in the Mediterranean. It
7670-405: The US President Lyndon B. Johnson on 5 June, warning that the US would not stand beside Turkey in case of a consequential Soviet invasion of Turkish territory. Meanwhile, by 1964, enosis was a Greek policy and would not be abandoned; Makarios and the Greek prime minister Georgios Papandreou agreed that enosis should be the ultimate aim and King Constantine wished Cyprus "a speedy union with
7788-521: The affected areas is highly acidic, with a pH range of 2.1–4.9, and shows elevated electrical conductivity levels between 280 and 1561 mS/cm. These changes in water chemistry make the environment inhospitable for fish, essentially rendering the water uninhabitable for aquatic life. Numerous copper alloys have been formulated, many with important uses. Brass is an alloy of copper and zinc . Bronze usually refers to copper- tin alloys, but can refer to any alloy of copper such as aluminium bronze . Copper
7906-485: The area and expanded the political influence of Kition. After c. 850 BC, the sanctuaries [at the Kathari site] were rebuilt and reused by the Phoenicians. Cyprus is at a strategic location in the Eastern Mediterranean. It was ruled by the Neo-Assyrian Empire for a century starting in 708 BC, before a brief spell under Egyptian rule and eventually Achaemenid rule in 545 BC. The Cypriots, led by Onesilus , king of Salamis, joined their fellow Greeks in
8024-431: The atmosphere; 150 mg/kg in soil; 30 mg/kg in vegetation; 2 μg/L in freshwater and 0.5 μg/L in seawater. Most copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper. Sites include Chuquicamata , in Chile, Bingham Canyon Mine , in Utah, United States, and El Chino Mine , in New Mexico, United States. According to
8142-458: The beginning of the Neolithic c. 7500 BC . Copper smelting was independently invented in different places. The earliest evidence of lost-wax casting copper comes from an amulet found in Mehrgarh , Pakistan, and is dated to 4000 BC. Investment casting was invented in 4500–4000 BC in Southeast Asia Smelting was probably discovered in China before 2800 BC, in Central America around 600 AD, and in West Africa about
8260-416: The calls of the Turkish Cypriot administration. Turkish Cypriots started living in enclaves . The republic's structure was changed, unilaterally, by Makarios, and Nicosia was divided by the Green Line , with the deployment of UNFICYP troops. In 1964, Turkey threatened to invade Cyprus in response to the continuing Cypriot intercommunal violence , but this was stopped by a strongly worded telegram from
8378-479: The company, especially when sourced from fossil fuels, and from engines required for copper extraction and refinement. Companies that mine land often mismanage waste, rendering the area sterile for life. Additionally, nearby rivers and forests are also negatively impacted. The Philippines is an example of a region where land is overexploited by mining companies. Copper mining waste in Valea Şesei, Romania, has significantly altered nearby water properties. The water in
8496-407: The continuation of the British rule, then demanded the annexation of the island to Turkey, and in the 1950s, together with Turkey, established a policy of taksim , the partition of Cyprus and the creation of a Turkish polity in the north. Following nationalist violence in the 1950s , Cyprus was granted independence in 1960. The crisis of 1963–64 brought further intercommunal violence between
8614-522: The deprotonated amide ligands. Complexes of copper(III) are also found as intermediates in reactions of organocopper compounds, for example in the Kharasch–Sosnovsky reaction . A timeline of copper illustrates how this metal has advanced human civilization for the past 11,000 years. Copper occurs naturally as native metallic copper and was known to some of the oldest civilizations on record. The history of copper use dates to 9000 BC in
8732-461: The depths of the Pacific Ocean approximately 3000–6500 meters below sea level. These nodules contain other valuable metals such as cobalt and nickel . Copper has been in use for at least 10,000 years, but more than 95% of all copper ever mined and smelted has been extracted since 1900. As with many natural resources, the total amount of copper on Earth is vast, with around 10 tons in
8850-563: The discovery of iron smelting . Production in the Old Copper Complex in Michigan and Wisconsin is dated between 6500 and 3000 BC. A copper spearpoint found in Wisconsin has been dated to 6500 BC. Copper usage by the indigenous peoples of the Old Copper Complex from the Great Lakes region of North America has been radiometrically dated to as far back as 7500 BC. Indigenous peoples of North America around
8968-593: The ensuing occupation and the declaration of independence by the TRNC have been condemned by United Nations resolutions, which are reaffirmed by the Security Council every year. Attempts to resolve the Cyprus dispute have continued. In 2004, the Annan Plan , drafted by then UN Secretary General Kofi Annan , was put to a referendum in both Cypriot administrations. 65% of Turkish Cypriots voted in support of
9086-605: The entire island, including its territorial waters and exclusive economic zone , with the exception of the Sovereign Base Areas of Akrotiri and Dhekelia , which remain under the UK's control according to the London and Zürich Agreements . However, the Republic of Cyprus is de facto partitioned into two main parts: the area under the effective control of the Republic, in the south and west and comprising about 59% of
9204-494: The ever-present tax collectors fueled Greek nationalism, and by the 20th century the idea of union with newly independent Greece was firmly rooted among Greek Cypriots. Under Ottoman rule, numeracy, school enrolment and literacy rates were all low. They persisted some time after Ottoman rule ended, and then increased rapidly during the twentieth century. In the aftermath of the Russo-Turkish War (1877–1878) and
9322-545: The fastest water exchange rate (speed of water ligands attaching and detaching) for any transition metal aquo complex . Adding aqueous sodium hydroxide causes the precipitation of light blue solid copper(II) hydroxide . A simplified equation is: Aqueous ammonia results in the same precipitate. Upon adding excess ammonia, the precipitate dissolves, forming tetraamminecopper(II) : Many other oxyanions form complexes; these include copper(II) acetate , copper(II) nitrate , and copper(II) carbonate . Copper(II) sulfate forms
9440-446: The first humans coincides with the extinction of the 75 cm (2.46 ft) high Cypriot pygmy hippopotamus and 1 metre (3 ft 3 in) tall Cyprus dwarf elephant , the only large mammals native to the island. Neolithic farming communities emerged on the island by around 10,500 years ago (8500 BC). Remains of an eight-month-old cat were discovered buried with a human body at a separate Neolithic site in Cyprus. The grave
9558-419: The idea that "Cyprus is Turkish" and the ruling party declared Cyprus to be a part of the Turkish homeland that was vital to its security. Upon realising that the fact that the Turkish Cypriot population was only 20% of the islanders made annexation unfeasible, the national policy was changed to favour partition. The slogan "Partition or Death" was frequently used in Turkish Cypriot and Turkish protests starting in
9676-471: The island is no longer considered by academics to be accurate. It is now accepted that the medieval period saw increasing numbers of Greek Cypriots elevated to the upper classes, a growing Greek middle ranks , and the Lusignan royal household even marrying Greeks. This included King John II of Cyprus who married Helena Palaiologina . In 1570, a full-scale Ottoman assault with 60,000 troops brought
9794-532: The island entered a period of impoverishment. Full Byzantine rule was restored in 965, when Emperor Nikephoros II Phokas scored decisive victories on land and sea. In 1156 Raynald of Châtillon and Thoros II of Armenia brutally sacked Cyprus over a period of three weeks, stealing so much plunder and capturing so many of the leading citizens and their families for ransom, that the island took generations to recover. Several Greek priests were mutilated and sent away to Constantinople. In 1185 Isaac Komnenos ,
9912-405: The island from Anatolia . This new community also included banished Anatolian tribes, "undesirable" persons and members of various "troublesome" Muslim sects, as well as a number of new converts on the island. The Ottomans abolished the feudal system previously in place and applied the millet system to Cyprus, under which non-Muslim peoples were governed by their own religious authorities. In
10030-459: The island under Ottoman control, despite stiff resistance by the inhabitants of Nicosia and Famagusta. Ottoman forces capturing Cyprus massacred many Greek and Armenian Christian inhabitants. The previous Latin elite were destroyed and the first significant demographic change since antiquity took place with the formation of a Muslim community. Soldiers who fought in the conquest settled on the island and Turkish peasants and craftsmen were brought to
10148-581: The island was seized in 333 BC by Alexander the Great . Subsequent rule by Ptolemaic Egypt , the Classical and Eastern Roman Empire , Arab caliphates for a short period, the French Lusignan dynasty and the Venetians was followed by over three centuries of Ottoman rule between 1571 and 1878 ( de jure until 1914). Cyprus was placed under the United Kingdom 's administration based on
10266-541: The island's area, and the north, administered by the self-declared Turkish Republic of Northern Cyprus, covering about 36% of the island's area. Another nearly 4% of the island's area is covered by the UN buffer zone . The international community considers the northern part of the island to be territory of the Republic of Cyprus occupied by Turkish forces. The occupation is viewed as illegal under international law and amounting to illegal occupation of EU territory since Cyprus became
10384-449: The island's predominantly Greek character dating from this period. Cyprus occupies an important role in Greek mythology , being the birthplace of Aphrodite and Adonis , and home to King Cinyras , Teucer and Pygmalion . Literary evidence suggests an early Phoenician presence at Kition , which was under Tyrian rule at the beginning of the 10th century BC. Some Phoenician merchants who were believed to come from Tyre colonised
10502-457: The late 1950s and continuing throughout the 1960s. Although after the Zürich and London conferences Turkey seemed to accept the existence of the Cypriot state and to distance itself from its policy of favouring the partition of the island, the goal of the Turkish and Turkish Cypriot leaders remained that of creating an independent Turkish state in the northern part of the island. In January 1950,
10620-511: The later spelling first used around 1530. Copper, silver , and gold are in group 11 of the periodic table; these three metals have one s-orbital electron on top of a filled d- electron shell and are characterized by high ductility , and electrical and thermal conductivity. The filled d-shells in these elements contribute little to interatomic interactions, which are dominated by the s-electrons through metallic bonds . Unlike metals with incomplete d-shells, metallic bonds in copper are lacking
10738-419: The level of <1% Cu. Concentration of the ore is required, which begins with comminution followed by froth flotation . The remaining concentrate is the smelted, which can be described with two simplified equations: Cuprous oxide reacts with cuprous sulfide to convert to blister copper upon heating This roasting gives matte copper, roughly 50% Cu by weight, which is purified by electrolysis. Depending on
10856-449: The militant activity of EOKA. The Turkish Cypriots also viewed themselves as a distinct ethnic group of the island and believed in their having a separate right to self-determination from Greek Cypriots. Meanwhile, in the 1950s, Turkish leader Menderes considered Cyprus an "extension of Anatolia", rejected the partition of Cyprus along ethnic lines and favoured the annexation of the whole island to Turkey. Nationalistic slogans centred on
10974-482: The mine for $ 300 million. Northparkes was one of the first mine sites to have automated loaders, and also the first block-cave mine in Australia. Copper Copper is a chemical element ; it has symbol Cu (from Latin cuprum ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity . A freshly exposed surface of pure copper has
11092-568: The mine is projected to extend at least to the year 2032. Until 2023, the mine was owned by the China Molybdenum Group (CMOC), with the remaining 20% owned by the Sumitomo Group . The mine was previously 80% owned by North Limited , with a takeover by Rio Tinto in 2000, before selling its stake in 2013. In December 2023, it was announced that Evolution Mining completed the purchase of an 80% controlling interest in
11210-421: The minority Turkish Cypriots a permanent veto, 30% in parliament and administration, and granting the three mother-states guarantor rights. However, the division of power as foreseen by the constitution soon resulted in legal impasses and discontent on both sides, and nationalist militants started training again, with the military support of Greece and Turkey respectively. The Greek Cypriot leadership believed that
11328-472: The modern world. The price of copper is volatile . After a peak in 2022 the price unexpectedly fell. The global market for copper is one of the most commodified and financialized of the commodity markets , and has been so for decades. The great majority of copper ores are sulfides. Common ores are the sulfides chalcopyrite (CuFeS 2 ), bornite (Cu 5 FeS 4 ) and, to a lesser extent, covellite (CuS) and chalcocite (Cu 2 S). These ores occur at
11446-423: The mother country". Greece dispatched 10,000 troops to Cyprus to counter a possible Turkish invasion. The crisis of 1963–64 had brought further intercommunal violence between the two communities, displaced more than 25,000 Turkish Cypriots into enclaves and brought the end of Turkish Cypriot representation in the republic. On 15 July 1974, the Greek military junta under Dimitrios Ioannides carried out
11564-466: The name is Κύπρος ( Kýpros ). The etymology of the name is unknown. Suggestions include: Through overseas trade, the island has given its name to the Classical Latin word for copper through the phrase aes Cyprium , "metal of Cyprus", later shortened to Cuprum . The standard demonym relating to Cyprus or its people or culture is Cypriot . The terms Cypriote and Cyprian (later
11682-553: The north. Cyprus was granted independence in 1960, following an armed campaign spearheaded by EOKA. As per the Zürich and London Agreement , Cyprus officially attained independence on 16 August 1960, and at the time had a total population of 573,566; of whom 442,138 (77.1%) were Greeks, 104,320 (18.2%) Turks, and 27,108 (4.7%) others. The UK retained the two Sovereign Base Areas of Akrotiri and Dhekelia , while government posts and public offices were allocated by ethnic quotas, giving
11800-527: The northern coast, the Arabs exerted more influence in the south. In 688, Emperor Justinian II and Caliph Abd al-Malik signed a treaty whereby Cyprus would be paying an equal amount of tribute to the Caliphate and tax to the Empire, but would remain politically neutral to both while being retained as a province administered by the Empire. There are no Byzantine churches which survive from this period, and
11918-516: The numerous copper sulfides , important examples include copper(I) sulfide ( Cu 2 S ) and copper monosulfide ( CuS ). Cuprous halides with fluorine , chlorine , bromine , and iodine are known, as are cupric halides with fluorine , chlorine , and bromine . Attempts to prepare copper(II) iodide yield only copper(I) iodide and iodine. Copper forms coordination complexes with ligands . In aqueous solution, copper(II) exists as [Cu(H 2 O) 6 ] . This complex exhibits
12036-428: The ore, sometimes other metals are obtained during the electrolysis including platinum and gold. Aside from sulfides, another family of ores are oxides. Approximately 15% of the world's copper supply derives from these oxides. The beneficiation process for oxides involves extraction with sulfuric acid solutions followed by electrolysis. In parallel with the above method for "concentrated" sulfide and oxide ores, copper
12154-605: The plan and 74% Greek Cypriots voted against the plan, claiming that it disproportionately favoured Turkish Cypriots and gave unreasonable influence over the nation to Turkey. In total, 66.7% of the voters rejected the Annan Plan . On 1 May 2004 Cyprus joined the European Union , together with nine other countries. Cyprus was accepted into the EU as a whole, although the EU legislation is suspended in Northern Cyprus until
12272-470: The properties of the displaced Greek Cypriots. Among a variety of sanctions against Turkey, in mid-1975 the US Congress imposed an arms embargo on Turkey for using US-supplied equipment during the Turkish invasion of Cyprus in 1974. There were 1,534 Greek Cypriots and 502 Turkish Cypriots missing as a result of the fighting from 1963 to 1974. The Republic of Cyprus has de jure sovereignty over
12390-713: The rights given to Turkish Cypriots under the 1960 constitution were too extensive and designed the Akritas plan , which was aimed at reforming the constitution in favour of Greek Cypriots, persuading the international community about the correctness of the changes and violently subjugating Turkish Cypriots in a few days should they not accept the plan. Tensions were heightened when Cypriot President Archbishop Makarios III called for constitutional changes , which were rejected by Turkey and opposed by Turkish Cypriots. Intercommunal violence erupted on 21 December 1963, when two Turkish Cypriots were killed at an incident involving
12508-750: The secret to its manufacturing process became lost. The Romans said the blue pigment was made from copper, silica, lime and natron and was known to them as caeruleum . The Bronze Age began in Southeastern Europe around 3700–3300 BC, in Northwestern Europe about 2500 BC. It ended with the beginning of the Iron Age, 2000–1000 BC in the Near East, and 600 BC in Northern Europe. The transition between
12626-435: The strong Hellenistic-Christian character that continues to be a hallmark of the Greek Cypriot community. Beginning in 649, Cyprus endured repeated attacks and raids launched by Umayyad Caliphate . Many were quick raids, but others were large-scale attacks in which many Cypriots were killed and great wealth carried off or destroyed. The city of Salamis was destroyed and never rebuilt. Byzantine control remained stronger in
12744-438: The sugar is signaled by a color change from blue Cu(II) to reddish copper(I) oxide. Schweizer's reagent and related complexes with ethylenediamine and other amines dissolve cellulose . Amino acids such as cystine form very stable chelate complexes with copper(II) including in the form of metal-organic biohybrids (MOBs). Many wet-chemical tests for copper ions exist, one involving potassium ferricyanide , which gives
12862-529: The summer of 1974 dominate the politics on the island, as well as Greco-Turkish relations . Turkish settlers have been settled in the north with the encouragement of the Turkish and Turkish Cypriot states. The Republic of Cyprus considers their presence a violation of the Geneva Convention , whilst many Turkish settlers have since severed their ties to Turkey and their second generation considers Cyprus to be their homeland. The Turkish invasion,
12980-417: The temperaments of the sultans and local officials. The ratio of Muslims to Christians fluctuated throughout the period of Ottoman domination. In 1777–78, 47,000 Muslims constituted a majority over the island's 37,000 Christians. By 1872, the population of the island had risen to 144,000, comprising 44,000 Muslims and 100,000 Christians. The Muslim population included numerous crypto-Christians , including
13098-399: The top kilometer of Earth's crust, which is about 5 million years' worth at the current rate of extraction. However, only a tiny fraction of these reserves is economically viable with present-day prices and technologies. Estimates of copper reserves available for mining vary from 25 to 60 years, depending on core assumptions such as the growth rate. Recycling is a major source of copper in
13216-427: The two communities, displaced more than 25,000 Turkish Cypriots into enclaves and brought the end of Turkish Cypriot representation in the republic. On 15 July 1974, a coup d'état was staged by Greek Cypriot nationalists and elements of the Greek military junta . This action precipitated the Turkish invasion of Cyprus on 20 July, which led to the capture of the present-day territory of Northern Cyprus and
13334-609: The wider Mediterranean world driven by the trade in copper extracted from the Troodos Mountains, which stimulated the development of urbanised settlements across the island, with records suggesting that Cyprus at this time was ruled by "kings" who corresponded with the leaders of other Mediterranean states (like the pharaohs of the New Kingdom of Egypt , as documented in the Amarna letters ). The first recorded name of
13452-427: Was a natural right. In the 1950s, the pursuit of enosis became a part of the Greek national policy. Initially, the Turkish Cypriots favoured the continuation of the British rule. However, they were alarmed by the Greek Cypriot calls for enosis , as they saw the union of Crete with Greece, which led to the exodus of Cretan Turks , as a precedent to be avoided, and they took a pro-partition stance in response to
13570-648: Was actively pursued by the Cypriot Orthodox Church , which had its members educated in Greece. These religious officials, together with Greek military officers and professionals, some of whom still pursued the Megali Idea , would later found the guerrilla organisation EOKA (Ethniki Organosis Kyprion Agoniston or National Organisation of Cypriot Fighters). The Greek Cypriots viewed the island as historically Greek and believed that union with Greece
13688-707: Was during this period that the island was fully Hellenised . In 58 BC Cyprus was acquired by the Roman Republic and became Roman Cyprus in 22 BC. When the Roman Empire was divided into Eastern and Western parts in 286, Cyprus became part of the East Roman Empire (also called the Byzantine Empire ), and would remain so for some 900 years. Under Byzantine rule, the Greek orientation that had been prominent since antiquity developed
13806-527: Was found in 1857 on the Keweenaw Peninsula in Michigan, US. Native copper is a polycrystal , with the largest single crystal ever described measuring 4.4 × 3.2 × 3.2 cm . Copper is the 26th most abundant element in Earth's crust , representing 50 ppm compared with 75 ppm for zinc , and 14 ppm for lead . Typical background concentrations of copper do not exceed 1 ng/m in
13924-540: Was recognised as King of Cyprus by Henry VI, Holy Roman Emperor . Following the death in 1473 of James II , the last Lusignan king, the Republic of Venice assumed control of the island, while the late king's Venetian widow, Queen Catherine Cornaro , reigned as figurehead. Venice formally annexed the Kingdom of Cyprus in 1489, following the abdication of Catherine. The Venetians fortified Nicosia by building
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