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: H6G, synthetic _database_code_amcsd 0002298 9.4394 9.4394 6.8861 90 90 120 P6_3/m atom x y z occ Ca1 2/3 1/3 .0021 Ca2 .2478 .9917 .25 P .3995 .3691 .25 O1 .3319 .4862 .25 O2 .5806 .4614 .25 O3 .3437 .2593 .0697 OH 0 0 .1906 .5 H 0 0 .0608 .5