Chromium-dravite
Bosi F, Lucchesi S, Reznitskii L
European Journal of Mineralogy 16 (2004) 345-352
Crystal chemistry of the dravite-chromdravite series
Note: Tourmaline TMt6b
Locality: Sludyanka crystalline complex, Lake Baikal, Russia
_database_code_amcsd 0007058
16.0377 16.0377 7.3157 90 90 120 R3m
atom       x       y      z  occ  Uiso
NaX        0       0  .2254 .892 .0183
CaX        0       0  .2254 .068 .0183
KX         0       0  .2254 .017 .0183
CrY   .12339 .061695 .63757 .743 .0045
MgY   .12339 .061695 .63757 .154 .0045
V3+Y  .12339 .061695 .63757 .081 .0045
Fe2+Y .12339 .061695 .63757 .012 .0045
Ti4+Y .12339 .061695 .63757 .010 .0045
AlZ   .29781  .26188 .60891 .390 .0052
MgZ   .29781  .26188 .60891 .310 .0052
CrZ   .29781  .26188 .60891 .300 .0052
SiT   .19013  .18840      0 .996 .0046
AlT   .19013  .18840      0 .004 .0046
B     .10992  .21984  .4541      .0048
O1W        0       0  .7651 .668 .0067
F1W        0       0  .7651 .332 .0067
O2    .06024  .12048  .4893      .0064
O3V    .2565  .12825  .5102      .0097
O4    .09262  .18524  .0720      .0100
O5     .1826   .0913  .0913      .0089
O6    .19144  .18221  .7803      .0074
O7    .28310  .28278  .0734      .0091
O8    .20752  .26819  .4382      .0104
H3V     .237   .1185    .36 .994   .14