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: T80 Locality: East Africa _database_code_amcsd 0005444 15.957 15.957 7.175 90 90 120 R3m atom x y z occ Uiso CaX 0 0 .8408 .746 .0137 NaX 0 0 .8408 .221 .0137 MgY .06322 .93678 .4375 .910 .0062 TiY .06322 .93678 .4375 .009 .0062 VY .06322 .93678 .4375 .054 .0062 LiY .06322 .93678 .4375 .022 .0062 CrY .06322 .93678 .4375 .005 .0062 AlZ .26159 .29800 .4530 .920 .0055 MgZ .26159 .29800 .4530 .080 .0055 Si .19043 .19223 .0662 .934 .0056 Al .19043 .19223 .0662 .066 .0056 B .8902 .1098 .6143 .0071 F1 0 0 .2924 .854 .0085 OH1 0 0 .2924 .146 .0085 O2 .93957 .06043 .5916 .0099 OH3 .13402 .86598 .5559 .0091 O4 .90779 .09221 -.00674 .0115 O5 .09091 .90909 -.0279 .0111 O6 .18708 .19627 .28973 .0084 O7 .28518 .28567 -.01532 .0088 O8 .27027 .20945 .62417 .0090