Microscopic inclusions of the very rare Ni-Co-As sulphide mineral vozhminite in bornite matrix, from the type locality in Vozhminskii Massif (Vozhmin), Russia. Probably analyzed by the former owner of the specimen (the Vandenbroucke Museum, but the analysis is no longer available). Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Vozhminite
Vozhminite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Ni₄AsS₂.
It crystallizes in the hexagonal crystal system.
Key properties: specific gravity 6.2; Black streak; Metallic. R1 –R2: (400) —, (420) 35.0–41.2, (440) 37.0–43.0, (460) 39.2–45.0, (480) 41.7–47.0, (500) 44.0–48.6 luster.
IMA symbol Voz, IMA status: approved, named in 1981.
Found in heazlewoodite ore in serpentinites.
It is found associated with Heazlewoodite, tučekite, magnetite, geversite, copper.
The name refers to its occurrence in the Vozhmin massif, Karelia, Russia.