Sulfarsenide mineral explained

The sulfarsenide minerals are a subgroup of the sulfide minerals which include arsenic replacing sulfur as an anion in the formula.^[1] Antimony and bismuth may occur with or in place of the arsenic as in ullmannite. The chemical formula of a sulfarsenide looks like a sulfosalt, however the structures are distinctly different. In sulfosalts the arsenic replaces a metal ion.^[1]

The sulfarsenides are grouped with the sulfides in both the Dana and Strunz mineral classification systems.^{[2] [3]}

Examples include:^{[1] [4] [5]}

• Arsenopyrite group:
  • • • • • • • • • • Arsenopyrite Glaucodot Gudmundite Lautite Alloclasite Cobaltite group

Notes and References

1. Klein, Cornelis and Cornelius S. Hurlbut, 1985, Manual of Mineralogy, 20th ed., John Wiley and Sons, New York, p. 290
2. http://webmineral.com/dana/II-2.shtml#2.1 Webmineral Dana
3. http://webmineral.com/strunz/II.shtml Webmineral Strunz
4. http://rruff.info/about/downloads/AM93_1183.pdf Hexiong Yang and Robert T. Downs, Crystal structure of glaucodot, (Co,Fe)AsS, and its relationships to marcasite and arsenopyrite, American Mineralogist, Volume 93, pages 1183–1186, 2008
5. Palache, C., H. Berman, and C. Frondel (1944) Dana’s system of mineralogy, (7th edition), v. I, p. 296