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: T75 Locality: East Africa _database_code_amcsd 0005439 15.940 15.940 7.163 90 90 120 R3m atom x y z occ Uiso CaX 0 0 .8408 .768 .0136 NaX 0 0 .8408 .205 .0136 MgY .06305 .93695 .4356 .930 .0068 TiY .06305 .93695 .4356 .011 .0068 VY .06305 .93695 .4356 .020 .0068 LiY .06305 .93695 .4356 .037 .0068 CrY .06305 .93695 .4356 .002 .0068 AlZ .26155 .29793 .4525 .947 .0058 MgZ .26155 .29793 .4525 .053 .0058 Si .19044 .19229 .0652 .925 .0057 Al .19044 .19229 .0652 .075 .0057 B .8902 .1098 .6145 .0064 F1 0 0 .2907 .737 .0086 OH1 0 0 .2907 .263 .0086 O2 .9395 .0605 .5907 .0099 OH3 .1339 .8661 .5552 .0093 O4 .90783 .09217 -.0075 .0119 O5 .09092 .90908 -.0291 .0118 O6 .1869 .1963 .2890 .0086 O7 .2853 .2859 -.0158 .0086 O8 .2701 .2092 .6237 .0090