Apatite-(CaOH) Wilson R M, Elliot J C, Dowker S E P American Mineralogist 84 (1999) 1406-1414 Rietveld refinement of the crystallographic structure of human dental enamel apatites Sample: RQ1 - enamel _database_code_amcsd 0002312 9.4584 9.4584 6.8808 90 90 120 P6_3/m atom x y z occ Ca1 2/3 1/3 .0019 .97 Na1 2/3 1/3 .0019 .02 Mg1 2/3 1/3 .0019 .01 Ca2 .2448 .9879 .25 .92 Na2 .2448 .9879 .25 .02 P .4025 .3693 .25 .92 O1 .3310 .4880 .25 .91 O2 .5821 .4574 .25 .96 O3 .3437 .2611 .0737 .91 Oh 0 0 .1817 .51 H 0 0 .0608