Ruarsite
Ruarsite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula RuAsS.
It crystallizes in the monoclinic crystal system.
Key properties: specific gravity 7.08; Grayish black streak; Metallic luster.
IMA symbol Rua, IMA status: approved, named in 1979.
Found in heavy mineral concentrates and in chromium ore derived from an Alpine-type ultramafic (Anduo, Tibet, China).
It is found associated with Iridosmine, rutheniridosmine, ruthenosmiridium, Pt–Ir alloy, Ru–Fe alloy, osmium, sperrylite, laurite, chromian spinel, pyrite, pyrrhotite, löllingite.
The name refers to the chemical composition RUthenium, ARsenic, and Sulfur.
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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