Ternary plot of the composition colimaite by weight percent. — Photo: Kaputt · CC BY 3.0
Colimaite
A potassium-vanadium sulfide collected from the crater of Mexico's Colima volcano — the natural analogue of synthetic K₃VS₄.
Intro adapted from Wikipedia (CC BY-SA).
Colimaite is an IMA-recognized mineral species in the sulfide class, with the chemical formula K₃VS₄.
It crystallizes in the orthorhombic crystal system (space group Pnma).
Key properties: specific gravity 2.235; Yellow-green streak; Resinous to greasy luster.
IMA symbol Com, IMA status: approved, named in 2007.
A sublimate found in an active volcanic fumarole.
It is found associated with Cristobalite, arcanite, thenardite, barite, native gold, shcherbinaite, vanadium.
The name refers to the discovery locality, the Colima volcano.