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: RHP - enamel _database_code_amcsd 0002310 9.4586 9.4586 6.8809 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 .2470 .9912 .25 .93 Na2 .2470 .9912 .25 .02 P .3999 .3691 .25 .92 O1 .3299 .4865 .25 .93 O2 .5781 .4568 .25 .96 O3 .3431 .2590 .0713 .92 Oh 0 0 .1785 .83 H 0 0 .0608 .73