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arsenopyrite
arsenopyrite n. 
/ˌɑːsn̩ə(ʊ)ˈpʌɪrʌɪt/,
Brit. /ˌɑːsənə(ʊ)ˈpʌɪrʌɪt/
, /ˌɑːsənə(ʊ)ˈpʌɪrʌɪt//ˌɑːsn̩ə(ʊ)ˈpʌɪrʌɪt/U.S. /ˌɑrsənoʊˈpaɪˌraɪt/
[after German Arsenopyrit (1853 in the source reviewed in quot. 1854), itself after post-classical Latin arsenopyrites ( E. F. Glocker Generum et specierum mineralium secundum ordines naturales digestorum. Synopsis (1847) 38)] a sulphide mineral containing arsenic and iron, typically occurring as silvery-grey prisms with a metallic lustre; earlier called mispickel.Chemical formula: FeAsS. Crystal system: monoclinic./ˌɑrsənoʊˈpaɪˌraɪt/ΘΚΠ
the world > the earth > minerals > types of mineral > sulphides and related minerals > [noun] > marcasite or related minerals > arsenides
mispickel1683
arsenopyrite1854
rammelsbergite1854
geyerite1868
Plinian1868
pararammelsbergite1939
1854 J. D. Dana Syst. Mineral. (ed. 4) II. 62 Mispickel... Arsenopyrite, Glocker.
1955 R. M. Pearl How to know Minerals & Rocks 82 The most common arsenic material, arsenopyrite is an arsenide-sulfide of iron (FeAsS). Before..1847 it was known by the peculiar name of mispickel.
1992 R. M. Bone Geogr. Canad. North ii. vii. 160 The source of the arsenic was a gold refining process which involved roasting gold ores containing arsenopyrite.
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