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: T73 Locality: East Africa _database_code_amcsd 0005437 15.950 15.950 7.174 90 90 120 R3m atom x y z occ Uiso CaX 0 0 .8408 .762 .0136 NaX 0 0 .8408 .229 .0136 MgY .06326 .93674 .4384 .961 .0059 TiY .06326 .93674 .4384 .009 .0059 VY .06326 .93674 .4384 .008 .0059 LiY .06326 .93674 .4384 .020 .0059 CrY .06326 .93674 .4384 .001 .0059 AlZ .26165 .29806 .4535 .926 .0055 MgZ .26165 .29806 .4535 .074 .0055 Si .19043 .19224 .0669 .944 .0051 Al .19043 .19224 .0669 .056 .0051 B .8903 .1097 .6150 .0071 F1 0 0 .2930 .832 .0083 OH1 0 0 .2930 .168 .0083 O2 .93953 .06047 .5921 .0094 OH3 .13410 .86590 .5561 .0090 O4 .90793 .09207 -.0057 .0110 O5 .09099 .90901 -.0270 .0118 O6 .1871 .1962 .2901 .0084 O7 .28497 .2854 -.0147 .0081 O8 .2703 .2093 .6245 .0083