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Arsenate

Ceruleite

CuAl₄(AsO₄)₂(OH)₈(H₂O)₄
Crystal systemTriclinic
ClassArsenate
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Ceruleite specimen

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

Ceruleite

Ceruleite is an IMA-recognized mineral species in the arsenate class, with the chemical formula CuAl₄(AsO₄)₂(OH)₈(H₂O)₄.

It crystallizes in the triclinic crystal system.

IMA symbol Cru, IMA status: approved, named in 1900.

Found in the oxidized zone of arsenic-rich polymetallic mineral deposits; a post-mine product.

It is found associated with Alumopharmacosiderite, olivenite, schlossmacherite, mansfieldite, quartz (Emma Louisa mine, Chile); mansfieldite, quartz, barite, goethite (Bolivia).

The name comes from cerulean, for the sky-blue color of the mineral.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more C minerals or help write this entry.