smithsonite

smith·son·ite

S0497800 (smĭth′sə-nīt′)n. A mineral, ZnCO₃, sometimes used as a source of zinc.

[After James Smithson.]

smithsonite

(ˈsmɪθsəˌnaɪt) n (Minerals) a white mineral consisting of zinc carbonate in hexagonal crystalline form: occurs chiefly in dry limestone regions and is a source of zinc. Formula: ZnCO3. Also called (US): calamine [C19: named after James Smithson]

smith•son•ite

(ˈsmɪθ səˌnaɪt)

n. a mineral, zinc carbonate, ZnCO₃, found in crusts and masses: an ore of zinc. [1825–35; after J. Smithson, who distinguished it from calamine; see -ite¹]

Smithsonite

smithsonite

[′smith·sə‚nīt] (mineralogy) ZnCO₃ White, yellow, gray, brown, or green secondary carbonate mineral associated with sphalerite and commonly reniform, botryoidal, stalactitic, or granular; hardness is 5 on Mohs scale, and specific gravity is 4.30-4.45; it is an ore of zinc. Also known as calamine; dry-bone ore; szaskaite; zinc spar.

Smithsonite

(named after the British chemist and mineralogist J. Smithson, 1765-1829), a mineral of the natural carbonate group; chemical composition, ZnCO₃ (ZnO, 64.9 percent; CO₂, 35.1 percent). It contains as admixtures Fe, Mn, Cd, Co, Mg, and Pb. Smithsonite crystallizes in the trigonal system. The crystals, which occur rarely, are rhombohedral or scalenohe-dral. Smithsonite usually occurs as granular or earthy masses and stalactitic aggregates with a conchoidal structure. It is, among other colors, white, yellowish, gray, or brown. Its hardness on Mohs scale is 4–4.5, and its density is 4,300–4,400 kg/m³.

Smithsonite is a typical commercial mineral from the zone of oxidation of deposits of primary zinc sulfides in limestones that is formed as a result of the replacement of the limestones. Deposits are found in northern Mexico, Greece (Laurium), Poland (Olkusz), and southwestern Africa (Tsumeb). In the USSR, there are deposits in the Kazakh SSR, Uzbek SSR, and Transbaikalia. [23–1830–]

单词	smithsonite
释义	smithsonite smith·son·ite S0497800 (smĭth′sə-nīt′)n. A mineral, ZnCO₃, sometimes used as a source of zinc. [After James Smithson.] smithsonite (ˈsmɪθsəˌnaɪt) n (Minerals) a white mineral consisting of zinc carbonate in hexagonal crystalline form: occurs chiefly in dry limestone regions and is a source of zinc. Formula: ZnCO3. Also called (US): calamine [C19: named after James Smithson] smith•son•ite (ˈsmɪθ səˌnaɪt) n. a mineral, zinc carbonate, ZnCO₃, found in crusts and masses: an ore of zinc. [1825–35; after J. Smithson, who distinguished it from calamine; see -ite¹] Smithsonite smithsonite [′smith·sə‚nīt] (mineralogy) ZnCO₃ White, yellow, gray, brown, or green secondary carbonate mineral associated with sphalerite and commonly reniform, botryoidal, stalactitic, or granular; hardness is 5 on Mohs scale, and specific gravity is 4.30-4.45; it is an ore of zinc. Also known as calamine; dry-bone ore; szaskaite; zinc spar. Smithsonite (named after the British chemist and mineralogist J. Smithson, 1765-1829), a mineral of the natural carbonate group; chemical composition, ZnCO₃ (ZnO, 64.9 percent; CO₂, 35.1 percent). It contains as admixtures Fe, Mn, Cd, Co, Mg, and Pb. Smithsonite crystallizes in the trigonal system. The crystals, which occur rarely, are rhombohedral or scalenohe-dral. Smithsonite usually occurs as granular or earthy masses and stalactitic aggregates with a conchoidal structure. It is, among other colors, white, yellowish, gray, or brown. Its hardness on Mohs scale is 4–4.5, and its density is 4,300–4,400 kg/m³. Smithsonite is a typical commercial mineral from the zone of oxidation of deposits of primary zinc sulfides in limestones that is formed as a result of the replacement of the limestones. Deposits are found in northern Mexico, Greece (Laurium), Poland (Olkusz), and southwestern Africa (Tsumeb). In the USSR, there are deposits in the Kazakh SSR, Uzbek SSR, and Transbaikalia. [23–1830–] ThesaurusSeecalamine
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