Chlorapatite is formed in fluor-deficient environments, and found in calcium silicate marbles, in layered mafic intrusions and in diabases. It is known to replace triphylite in some granite pegmatites (Ptáček 2016). A monoclinic polymorph, chlorapatite-M is known.
What is the formula of Chlorapatite?
A phosphate mineral with the formula Ca5(PO4)3Cl.
Where is hydroxyapatite made?
Hydroxyapatite is present in bone and teeth; bone is made primarily of HA crystals interspersed in a collagen matrix—65 to 70% of the mass of bone is HA. Similarly HA is 70 to 80% of the mass of dentin and enamel in teeth. In enamel, the matrix for HA is formed by amelogenins and enamelins instead of collagen.
