Fluorapatite Comodi P, Liu Y, Zanazzi P F, Montagnoli M Physics and Chemistry of Minerals 28 (2001) 219-224 Structural and vibrational behaviour of fluorapatite with pressure. Part 1: in situ single-crystal X-ray diffraction investigation Sample: P = 4.72 GPa _database_code_amcsd 0008536 9.224 9.224 6.805 90 90 120 P6_3/m atom x y z Uiso Ca1 2/3 1/3 .0009 .0105 Ca2 -.011 .2383 .25 .0100 P .3683 .3976 .25 .0072 O1 .4836 .3233 .25 .010 O2 .4695 .5891 .25 .014 O3 .2565 .3420 .0694 .0176 F 0 0 .25 .035