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crocoite

[kroh-koh-ahyt, krok-oh-] /ˈkroʊ koʊˌaɪt, ˈkrɒk oʊ-/
noun
1.
a yellow, orange, or red mineral, lead chromate, PbCrO 4 , formed by replacement.
Also called crocoisite
[kroh-koh-uh-zahyt, krok-oh-] /ˈkroʊ koʊ əˌzaɪt, ˈkrɒk oʊ-/ (Show IPA)
.
Origin
1835-1845
1835-45; < Greek krokó(eis) saffron-colored + -ite1; see crocus
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for crocoisite

crocoite

/ˈkrəʊkəʊˌaɪt/
noun
1.
a rare orange secondary mineral consisting of lead chromate in monoclinic crystalline form. Formula: PbCrO4 Also called red-lead ore
Word Origin
C19: from Greek krokoeis saffron-coloured, golden + -ite1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for crocoisite

crocoite

mineral consisting of lead chromate, PbCrO4, that is identical in composition to chrome yellow, the artificial product used in paint. The element chromium was discovered in this mineral in 1797. Crocoite occurs as long, well-developed, prismatic crystals; the most beautiful specimens are from Dundas, Tasmania. Other localities include the Urals, Brazil, and the southwestern United States. Crocoite has a bright hyacinth-red to orange colour and an adamantine to vitreous lustre that dulls on exposure to sunlight.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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