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Phosphate

Calciopetersite

CaCu₆(PO₄)₂(PO₃OH)(OH)₆·3H₂O
Crystal systemHexagonal
ClassPhosphate
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Calciopetersite specimen

Calciopetersite Locality: Domašov nad Bystřicí, Sternberk (Sternberg), Olomouc Region, Moravia (Mähren; Maehren), Czech Republic Very small green acicular xls of Calciopetersite. Field of view 1,5 mm. Specimen and photo Leon Hupperichs. — Photo: Leon Hupperichs · CC BY-SA 3.0

Calciopetersite

Calciopetersite is an IMA-recognized mineral species in the phosphate class, with the chemical formula CaCu₆(PO₄)₂(PO₃OH)(OH)₆·3H₂O.

It crystallizes in the hexagonal crystal system (space group P6_3/m). It is a member of the Mixite structural group.

Key properties: specific gravity 3.179; Light olive-green streak; Vitreous luster; optically uniaxial.

IMA symbol Cpts, IMA status: approved, named in 2001.

A secondary mineral derived by weathering chalcopyrite and other copper sulfides.

It is found associated with Chrysocolla, a Ce-dominant analogue of petersite-(Y), malachite, allophane, goethite, lepidocrocite, chalcopyrite, pyrite, covellite, chalcocite.

The name refers to its composition (Ca > Y) and relationship to petersite-(Y).

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.