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 ...

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 ...