Schneiderhöhnite
Schneiderhöhnite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Fe²⁺Fe³⁺₃As³⁺₅O₁₃.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: Mohs hardness 3; specific gravity 4.3; Coffee-brown streak; Metallic to adamantine luster; optically biaxial.
IMA symbol Snh, IMA status: approved, named in 1973.
Found as a rare secondary mineral in an oxidation zone in a dolostone-hosted hydrothermal polymetallic ore deposit (Tsumeb, Namibia).
It is found associated with Zincian stottite, chalcocite, tennantite, leiteite (Tsumeb, Namibia); löllingite, karibibite, eosphorite, arseniosiderite, scorodite, quartz (Bou Azzer.
The mineral was named to honor Hans Schneiderhöhn (1887–1962), Professor of Mineralogy, University of Freiburg, Freiburg im Breisgau, Germany.