title: Aluminum-rich apatite.
abstract: More than 25 atomic percent of aluminum can susbtitute for other cations in the structure of apatite [A(10)(XO(4)) (6)Z(2)]. Such a synthetic product was obtained by expelling volatile constituents (H(2)O and F) from morinite during thermal treatment. Infrared absorption spectra, chemical analysis, and x-ray powder diffraction demonstrate that the aluminum has two coordination numbers, and more than twice as much aluminum substitutes for calcium (A position) as for phosphorus (X position).
authors.forename: D J
authors.initials: DJ
authors.lastname: Fisher
authors.forename: D
authors.initials: D
authors.lastname: McConnell