apatite

apatiitti puhekieltä A calcium fluoride phosphate of variable composition, sometimes used in the manufacture of fertilizer.
1967, Duncan McConnell et al., "Infrared Absorption of Carbonate Apatite," Science, New Series, vol. 155, no. 3762, p. 608,

We had prepared, by precipitation methods, finely divided crystalline apatites that were similar in crystal size and x-ray diffraction profile to bone apatite.