Ferhodsite
Ferhodsite is an IMA-recognized mineral species in the sulfide class, with the chemical formula (Fe,Rh,Ni,Ir,Cu,Co,Pt)₉₋ₓS₈.
It crystallizes in the tetragonal crystal system. It is a member of the Pentlandite structural group.
Key properties: specific gravity 7.186; Black streak; Metallic luster.
IMA symbol Frh, IMA status: approved, named in 2009.
Found in mineral separates from dunite (Nizhniy Tagil ultramafic massif) and Au-PGE- bearing alluvial placer deposits (Konder and along the River Seyba).
It is found associated with Cooperite, cuproiridsite, bowieite, kashinite, laurite, erlichmanite; commonly mantled and corroded by chengdeite.
The name comes from the first letters of three of its main chemical elements, Fe (iron), Rhodium, and Sulfur.