Viaeneite
Viaeneite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula (Fe,Pb)₄S₈O.
It crystallizes in the monoclinic crystal system.
Key properties: Mohs hardness 3; specific gravity 3.8; Black streak; Metallic. Anisotropism: Strong; orange, yellow-orange, greenish gray. Bireflectance: Distinct luster.
IMA symbol Via, IMA status: approved, named in 1993.
Found in a carbonate-hosted Pb–Zn deposit.
It is found associated with Pyrite, melnikovite, marcasite, greigite, sphalerite, galena, goethite, zincian siderite, smithsonite, dolomite, quartz, cerussite, anglesite.
The mineral was named to honor Professor Willy A. Viaene (1940–), Catholic University, Louvain, Belgium, who has made important contributions to geological sciences in Belgium.