Metallic inclusions of the two extremely rare palladium-bismuth minerals urvantsevite & froodite from the famous Talnakh deposit (Mayak Mine, Talnakh, Noril'sk, Putoran Plateau, Taimyr Peninsula, Krasnoyarsk Krai, Russian Federation) in a completely analyzed specimen by SEM/EdS. Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Froodite
Froodite is an IMA-recognized mineral species in the sulfide class, with the chemical formula PdBi₂.
It crystallizes in the monoclinic crystal system (space group C2/m).
Key properties: Mohs hardness 2.5; specific gravity 12.5–12.6; Black streak; Metallic, splendent, tarnishes quickly. Anisotropism: Evident, in pale and dark grays. R1 –R2: (400) — luster.
IMA symbol Fro, grandfathered status — known before the IMA’s founding, named in 1958.
Found in mill concentrates of As–Pb–Cu-rich ores (Frood mine, Canada); in Pd–Pt-bearing layered or pipelike ultramafic intrusives.
It is found associated with Chalcopyrite, cubanite, pyrite, pentlandite, altaite, hessite, galena, bismuth, pyrrhotite, tsumoite, parkerite, sudburyite, michenerite, sperrylite.
The name refers to the Frood mine in Canada, from where it was first noted.