Fluor-uvite MacDonald D J, Hawthorne F C The Canadian Mineralogist 33 (1995) 849-858 The crystal chemistry of Si=Al substitution in tourmaline Sample: T74 Locality: East Africa _database_code_amcsd 0005438 15.940 15.940 7.177 90 90 120 R3m atom x y z occ Uiso CaX 0 0 .8408 .697 .0137 NaX 0 0 .8408 .288 .0137 MgY .06324 .93676 .4388 .947 .0066 TiY .06324 .93676 .4388 .009 .0066 VY .06324 .93676 .4388 .017 .0066 LiY .06324 .93676 .4388 .025 .0066 CrY .06324 .93676 .4388 .002 .0066 AlZ .26165 .29799 .4541 .925 .0060 MgZ .26165 .29799 .4541 .075 .0060 Si .19035 .19211 .0672 .956 .0058 Al .19035 .19211 .0672 .044 .0058 B .8901 .1099 .6155 .0071 F1 0 0 .2928 .835 .0102 OH1 0 0 .2928 .165 .0102 O2 .9393 .0607 .5929 .0105 OH3 .1341 .8659 .5574 .0094 O4 .9076 .0924 -.0052 .0114 O5 .0909 .9091 -.0263 .0108 O6 .1869 .1962 .2902 .0086 O7 .2850 .2854 -.0143 .0087 O8 .2703 .2096 .6248 .0095