Apatite coatings, particularly hydroxyapatite (HA)—a naturally occurring form of apatite found in bones, have been shown to promote better integration with surrounding tissues. However ...

A. Apatite (calcium triphosphate): This mineral makes up the bones and teeth of vertebrates and the shells of inarticulate brachiopods. Calcium phosphate looks chalky when new, but can darken to black ...

Zapanta-Legros, R., Trautz, O. R., and LeGeros, J. P., Proc. Int. Assoc. Dent. Res., 42nd Gen. Meeting (1964). Elliot, J. C., thesis, University of London (1964 ...

and especially the unique apatite deposits at Kirovsk. The latter occur within the world's largest known massif of nepheline-rocks, the Khibine Tundra*.