Padmaite
Padmaite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula PdBiSe.
It crystallizes in the cubic crystal system.
Key properties: Mohs hardness 3–4; specific gravity 9.86; Metallic luster.
IMA symbol Pdm, IMA status: approved, named in 1990.
Found in metasomatic rocks in shungite-bearing metashales (Russia); in hydrothermally altered (sericitization, silicification, with minor K-metasomatism) granite-related mylonite (Brazil). An uncommon component in placer deposits.
It is found associated with Clausthalite, paraguanajuatite, bohdanowiczite, sobolevskite, froodite, hematite, native Bi and Au, roscoelite, chromium phengite, dolomite, quartz (Russia).
The name refers to the Russian river near where the first specimens were collected.