Green schlossmacherite associated to blue ceruleite from the type locality (El Guanaco Mine, Guanaco, Santa Catalina, Antofagasta Region, Chile). Analyzed specimen. — Photo: David Hospital · CC BY-SA 4.0
Schlossmacherite
Schlossmacherite is an IMA-recognized mineral species in the sulfate class, with the chemical formula (H₃O)Al₃(SO₄)₂(OH)₆.
It is a member of the Alunite-Alunite structural group.
Key properties: specific gravity 3; Waxy luster.
IMA symbol Ssm, IMA status: approved, named in 1979.
A rare secondary mineral found in the oxidized zone of a copper-bearing gold deposit.
It is found associated with Ceruleite, chenevixite, olivenite, alumopharmacosiderite, mansfieldite, barite, quartz, goethite.
The mineral was named to honor Professor Emeritus Karl Schlossmacher (1887–1980), Institute for Mineralogy and Petrography, Johannes Gutenberg University, Mainz, Germany.