Ruthenarsenite
Ruthenarsenite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula (Ru,Ni)As.
It crystallizes in the orthorhombic crystal system (space group Pnma). It is a member of the Modderite structural group.
Key properties: specific gravity 10.
IMA symbol Ras, IMA status: approved, named in 1973.
Occurs as inclusions in Os–Ir–Ru alloys (Papua New Guinea), and in Alpine-type ultramafics.
It is found associated with Rutheniridosmine, irarsite, iridarsenite.
The name refers to RUTHENium and ARSENic in the composition.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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