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arsenopyrite in British English
(ˌɑːsɪnəʊˈpaɪraɪt, ɑːˌsɛnə-)
noun
a white or grey metallic mineral consisting of a sulphide of iron and arsenic that forms monoclinic crystals with an orthorhombic shape: an ore of arsenic. Formula: FeAsS
Also called: mispickelarsenopyrite in American English
(ˌɑrsəˌnoʊˈpaɪˌraɪt)
noun
a silvery-white, hard, brittle, monoclinic mineral, FeAsS; iron arsenic sulfide: it is an ore of arsenic found asa twinned crystal in veins of metamorphic rock
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