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Mineral Variety

Carbonate-rich apatite

A rare member of the Apatite group which has the phosphate radical (PO4) partially replaced by a carbonate radical (CO3). It has a chemical formula of Ca5(PO4,CO3)3(OH,F). It is also known as Carbonate-Apatite, a name which was discredited by the IMA in 2008 and replaced with Carbonate-rich Apatite.

There are two types of Carbonate-rich Apatite:
Carbonate-rich fluorapatite: Ca5(PO4,CO3)3F
Carbonate-rich hydroxylapatite: Ca5(PO4,CO3)3(OH)

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