Orange metallic crystal aggregates of the extremely rare mineral vinciennite from the type locality in France (Chizeuil Mine, Chalmoux, Bourbon-Lancy, Saône-et-Loire, Bourgogne-Franche-Comté, France), in a completely analyzed specimen by SEM/EDS. Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Vinciennite
Vinciennite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Cu₁₀Fe₄SnAsS₁₆.
It crystallizes in the tetragonal crystal system.
Key properties: Metallic. Anisotropism: Weak, purplish blue to greenish brown-yellow. R1-R2: (420) 19.4-19.4, (460) 21.8-20.6 luster.
IMA symbol Vcn, IMA status: approved, named in 1983.
Found in a porphyry copper deposit with other tin-bearing sulfides (Maggie deposit, Canada).
It is found associated with Pyrite, chalcopyrite, colusite, stannite, stannoidite, mawsonite, bornite, enargite, tetrahedrite-tennantite, quartz, barite.
The mineral was named to honor Professor Henri Vincienne (1898-1965), who first called attention to the mineral. Type Ma<; erial: National School of Mines, Paris, France.