crocoite

croc·o·ite

C0756000 (krŏk′ō-īt′, krō′kō-) also croc·oi·site (krŏk′wə-zīt′)n. A rare lead chromate mineral, PbCrO₄, that forms brilliant orange crystals.

[Alteration of French crocoise, from Greek krokoeis, saffron-colored, from krokos, saffron; see crocus.]

crocoite

(ˈkrəʊkəʊˌaɪt) or

crocoisite

n (Minerals) a rare orange secondary mineral consisting of lead chromate in monoclinic crystalline form. Formula: PbCrO4. Also called: red-lead ore [C19: from Greek krokoeis saffron-coloured, golden + -ite¹]

cro•co•ite

(ˈkroʊ koʊˌaɪt, ˈkrɒk oʊ-)

n. an orange or red mineral, lead chromate, PbCrO₄. [1835–45; < Greek krokó(eis) saffron-colored + -ite¹]

Crocoite

enUK

crocoite

[′kräk·ə‚wīt] (mineralogy) PbCrO₄ A yellow to orange or hyacinth-red secondary mineral occurring as monoclinic, prismatic crystals; it is also massive granular. Also known as crocoisite; red lead ore.

Crocoite

a mineral of chemical composition Pb[CrO₄] (69.06 percent PbO, 30.94 percent CrO₃). It sometimes contains admixtures of silver and zinc. Crocoite crystallizes in the mono-clinic system, forming slender prismatic or acicular crystals of a bright orange-red color. It is brittle, with a mineralogical hardness of 2.5–3.0 and a density of 5,990–6,000 kg/m³. Crocoite is formed in the oxidized zone of polymetallic lead-zinc ore deposits occurring in ultrabasic rocks (chromium sources) or in their immediate vicinity. The best-known variety of crocoite is extracted from the Berezov deposit in the Urals; it forms crystal druses in beresovite fissures. Other crocoite deposits are located in Tasmania.

单词	crocoite
释义	crocoite enUK croc·o·ite C0756000 (krŏk′ō-īt′, krō′kō-) also croc·oi·site (krŏk′wə-zīt′)n. A rare lead chromate mineral, PbCrO₄, that forms brilliant orange crystals. [Alteration of French crocoise, from Greek krokoeis, saffron-colored, from krokos, saffron; see crocus.] crocoite (ˈkrəʊkəʊˌaɪt) or crocoisite n (Minerals) a rare orange secondary mineral consisting of lead chromate in monoclinic crystalline form. Formula: PbCrO4. Also called: red-lead ore [C19: from Greek krokoeis saffron-coloured, golden + -ite¹] cro•co•ite (ˈkroʊ koʊˌaɪt, ˈkrɒk oʊ-) n. an orange or red mineral, lead chromate, PbCrO₄. [1835–45; < Greek krokó(eis) saffron-colored + -ite¹] Crocoite enUK crocoite [′kräk·ə‚wīt] (mineralogy) PbCrO₄ A yellow to orange or hyacinth-red secondary mineral occurring as monoclinic, prismatic crystals; it is also massive granular. Also known as crocoisite; red lead ore. Crocoite a mineral of chemical composition Pb[CrO₄] (69.06 percent PbO, 30.94 percent CrO₃). It sometimes contains admixtures of silver and zinc. Crocoite crystallizes in the mono-clinic system, forming slender prismatic or acicular crystals of a bright orange-red color. It is brittle, with a mineralogical hardness of 2.5–3.0 and a density of 5,990–6,000 kg/m³. Crocoite is formed in the oxidized zone of polymetallic lead-zinc ore deposits occurring in ultrabasic rocks (chromium sources) or in their immediate vicinity. The best-known variety of crocoite is extracted from the Berezov deposit in the Urals; it forms crystal druses in beresovite fissures. Other crocoite deposits are located in Tasmania.
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