arsenopyrite

American  

[ahr-suh-noh-pahy-rahyt, ahr-sen-uh-] / ˌɑr sə noʊˈpaɪ raɪt, ɑrˌsɛn ə- /

noun

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

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arsenopyrite British  

/ ˌɑːsɪnəʊˈpaɪraɪt, ɑːˌsɛnə- /

noun

1. Also called: mispickel.  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

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Etymology

Origin of arsenopyrite

First recorded in 1880–85; arseno- + pyrite

Example Sentences

The pyrite has a small amount of arsenopyrite in it, and when this is burned arsenious oxide is formed as a vapor together with sulphur dioxide: 2FeAsS + 10O = Fe2O3 + As2O3 + 2SO2.

From An Elementary Study of Chemistry by McPherson, William

If arsenopyrite is heated in a current of air, what products are formed?

From An Elementary Study of Chemistry by McPherson, William

The former deposits contain arsenopyrite and copper-bearing pyrite impregnating a mica-quartz-schist, adjacent to and in apparent genetic relation with aplite or pegmatite intrusives.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)

It is very widely distributed, being sometimes found native, and sometimes combined, as AsS, realgar, As2S8, orpiment, and FeAsS, arsenopyrite.

From An Introduction to Chemical Science by Williams, Rufus Phillips

They are rather characteristic of the oxide zones of certain arsenical metallic ores, and are believed in many cases to have formed from arsenopyrite.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)