Cadmoindite, from Kudriavy Volcano, Iturup Island, Sakhalinskaya Obl, Far Eastern Region, Russian Federation — Photo: David Hospital - www.purple-sky-minerals.com · CC BY-SA 3.0
Cadmoindite
A rare cadmium-indium sulfide found around a 450–600 °C fumarole vent on the Kudriavy volcano in the Kuril Islands.
Intro adapted from Wikipedia (CC BY-SA).
Cadmoindite is an IMA-recognized mineral species in the sulfide class, with the chemical formula CdIn₂S₄.
It crystallizes in the cubic crystal system (space group Fd3m). It is a member of the Spinel structural group.
Key properties: specific gravity 4.864; Brown streak; Adamantine luster.
IMA symbol Cad, IMA status: approved, named in 2003.
Occurs as the bottom layer in fumarolic sublimate crusts.
It is found associated with Pyrite, cadmian wurtzite, rhenium disulfide, greenockite, lead-bismuth sulfide.
As the cadmium analogue of indite.