covellite

co·vel·lite

C0702300 (kō-vĕl′īt′, kō′və-līt′)n. A lustrous indigo-blue mineral, CuS, an important ore of copper.

[After Nicolò Covelli (1790-1829), Italian mineralogist.]

covellite

(kəʊˈvɛlaɪt; ˈkəʊvəˌlaɪt) nan indigo-blue copper sulphide ore, often referred to as blue copper or indigo copper

co•vel•lite

(koʊˈvɛl aɪt, ˈkoʊ vəˌlaɪt)

n. a mineral, copper sulfide, CuS, indigo in color and usu. occurring as a massive coating on other copper minerals. [1840–50; after NicolòCovelli (1790–1829), Italian mineralogist who found it; see -ite¹]

Covellite

enUK

covellite

[kō′ve‚līt] (mineralogy) CuS An indigo-blue mineral of metallic luster that crystallizes in the hexagonal system; it is usually massive or occurs in disseminations through other copper minerals and represents an ore of copper. Also known as indigo copper.

Covellite

(named for its discoverer, the Italian chemist N. Covelli, 1790–1829), a mineral of the sulfide class. Chemical composition, CuS; it contains 66.48 percent Cu and 33.52 percent S. The structure of covellite has Cu⁺ and Cu²⁺ atoms, as well as the simple ion S^2– and the paired ion S²^2–. The structural elements of Cu²⁺ surrounded by three S^2– and Cu+ ions, which are in the centers of paired tetrahedrons connected by S₂² ions, are located in layers and provide the perfect cleavage of covellite. Thus, the structurally regular formula for covellite will be (Cu₂S#x00B7;CuS₂). Crystals are very rare; secondary incrustations, as well as films on other sulfides or powdery masses that replace them, are common. The color is dark blue. Hardness on the mineralogical scale, 1.5–2.0; density, 4,590–4,670 kg/m³. Covellite is a typical mineral in the zone of secondary sulfide enrichment in the oxidized parts of sulfide copper deposits. It is used as a copper ore.

单词	covellite
释义	covellite enUK co·vel·lite C0702300 (kō-vĕl′īt′, kō′və-līt′)n. A lustrous indigo-blue mineral, CuS, an important ore of copper. [After Nicolò Covelli (1790-1829), Italian mineralogist.] covellite (kəʊˈvɛlaɪt; ˈkəʊvəˌlaɪt) nan indigo-blue copper sulphide ore, often referred to as blue copper or indigo copper co•vel•lite (koʊˈvɛl aɪt, ˈkoʊ vəˌlaɪt) n. a mineral, copper sulfide, CuS, indigo in color and usu. occurring as a massive coating on other copper minerals. [1840–50; after NicolòCovelli (1790–1829), Italian mineralogist who found it; see -ite¹] Covellite enUK covellite [kō′ve‚līt] (mineralogy) CuS An indigo-blue mineral of metallic luster that crystallizes in the hexagonal system; it is usually massive or occurs in disseminations through other copper minerals and represents an ore of copper. Also known as indigo copper. Covellite (named for its discoverer, the Italian chemist N. Covelli, 1790–1829), a mineral of the sulfide class. Chemical composition, CuS; it contains 66.48 percent Cu and 33.52 percent S. The structure of covellite has Cu⁺ and Cu²⁺ atoms, as well as the simple ion S^2– and the paired ion S²^2–. The structural elements of Cu²⁺ surrounded by three S^2– and Cu+ ions, which are in the centers of paired tetrahedrons connected by S₂² ions, are located in layers and provide the perfect cleavage of covellite. Thus, the structurally regular formula for covellite will be (Cu₂S#x00B7;CuS₂). Crystals are very rare; secondary incrustations, as well as films on other sulfides or powdery masses that replace them, are common. The color is dark blue. Hardness on the mineralogical scale, 1.5–2.0; density, 4,590–4,670 kg/m³. Covellite is a typical mineral in the zone of secondary sulfide enrichment in the oxidized parts of sulfide copper deposits. It is used as a copper ore.
随便看	american revolutionary war/article from the 1911 encyclopedia part 1 american revolutionary war/article from the 1911 encyclopedia part 2 american revolution bicentennial administration american revolution, military history american revolution round table american rhea american rheumatism association american rheumatism association medical information system american rhinologic society american rhododendron society american rhythm american riding instructor certification program american riding instructors association american rifle and pistol association american rifleman magazine american rights at work american rights litigators american risk and insurance association american risk management resources network, llc american river acoustic music camp american river college american river flood control district american river futbol club american river management society american river natural history association