Inclusions of the extremely rare germanium mineral carboirite in a matrix of sphalerite. From analysed material of the BRGM Workings at an altitude of 2000m (Carboire, Ariege, Midi-Pyrénées, France). Germanium minerals are extremely rare in Nature, since only 32 species from more than 5400 known mineral species are Germanium minerals. — Photo: David Hospital · CC BY-SA 4.0
Carboirite
Carboirite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Fe²⁺Al₂GeO₅(OH)₂.
It crystallizes in the triclinic crystal system (space group C-1). It is a member of the Chloritoid structural group.
IMA symbol Cb, IMA status: approved, named in 1980.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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