Silvery metallic crystal aggregates of the very rare Ag mineral vikingite from Nevada (Gabbs, Nye County, Nevada, United States of America). Find of 1979. Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Vikingite
Vikingite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Ag₅Pb₈Bi₁₃S₃₀.
It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Lillianite structural group.
Key properties: specific gravity 7.19.
IMA symbol Vkg, IMA status: approved, named in 1976.
in association with cosalite and as lamellae in galena in the gustavite-galena paragenesis (Ivigtut, Greenland).
It is found associated with Cosalite, galena (Ivigtut, Greenland); gustavite, heyrovskyite, quartz (La Roche-Balue quarry, France).
The name refers to the Vikings, early settlers of Greenland.