Stillwaterite
A palladium arsenide discovered in Montana's Stillwater complex.
Intro adapted from Wikipedia (CC BY-SA).
Stillwaterite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Pd₈As₃.
It crystallizes in the hexagonal crystal system (space group P-3). It is a member of the Stillwaterite structural group.
Key properties: specific gravity 10.96; Metallic. Anisotropism: Weak in air, dark gray to brownish gray; in oil luster.
IMA symbol Slw, IMA status: approved, named in 1974.
Found in layered ultramafic igneous bodies.
It is found associated with Gold, palladoarsenide, sperrylite, braggite, hollingworthite, chalcopyrite, digenite, pentlandite, pyrrhotite.
The name refers to the Stillwater mafic complex, Montana, USA.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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