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Formula: (H3O)Al3(SO4)2(OH)6
Anhydrous sulphate containing hydroxyl, alunite group,
hydronium mineral
Crystal System: Trigonal
Specific gravity: 3.00 calculated
Hardness: 3 to 4
Colour: Green
Environments
Although schlossmacherite was approved in 1979, to date (February 2024) it has been reported only from the type
locality.
Localities
At the type locality, the Emma Luisa mine, Guanaco, Taltal, Antofagasta Province, Antofagasta, Chile,
schlossmacherite occurs as polycrystalline aggregates and crusts. It is a rare
secondary mineral in the oxidised zone of a
copper-bearing gold deposit. Associated
minerals include ceruleite,
chenevixite, olivenite,
pharmacoalumite,
mansfieldite, baryte,
quartz and goethite
(Mindat, HOM).
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