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arsenopyrite

[ ahr-suh-noh-pahy-rahyt, ahr-sen-uh- ]

noun

  1. a common mineral, iron arsenic sulfide, FeAsS, occurring in silver-white to steel-gray crystals or masses: an ore of arsenic.

arsenopyrite

/ ˌɑːsɪnəʊˈpaɪraɪt; ɑːˌsɛnə- /

noun

  1. 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 calledmispickel
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of arsenopyrite1

First recorded in 1880–85; arseno- + pyrite

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