Arsenopyrite

Arsenopyrite


Composition: FeAsS

Crystal System : Monoclinic
Colours: Silver-white to steel-grey
Lustre : Metallic
Hardness (H) : 5.5-6.0
Specific Gravity (S.G) : 6.07

 

Distribution

Extremely rare. Listed on mindat.org, but not by Gebhard (1999) or Lombaard et al.(1986).

Occurrence

  • Hypogene

Paragenetic and General Notes

Presumably encountered usually in polished section. However, a specimen of arsenopyrite (EDS and XRD confirmed) associated with mimetite is in the collection of Paul De Bondt (http://www.mindat.org/gallery.php?loc=2428&min=305; accessed November 2015).