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 TMt3b
Locality: Sludyanka crystalline complex, Lake Baikal, Russia
_database_code_amcsd 0007057
16.0539 16.0539 7.3247 90 90 120 R3m
atom       x       y      z  occ   Uiso
NaX        0       0  .2255 .880  .0171
CaX        0       0  .2255 .073  .0171
KX         0       0  .2255 .017  .0171
CrY   .12335 .061675 .63774 .711 .00408
MgY   .12335 .061675 .63774 .146 .00408
V3+Y  .12335 .061675 .63774 .118 .00408
Fe2+Y .12335 .061675 .63774 .017 .00408
ZnY   .12335 .061675 .63774 .007 .00408
Ti4+Y .12335 .061675 .63774 .001 .00408
CrZ   .29779  .26179 .60896 .369  .0045
AlZ   .29779  .26179 .60896 .331  .0045
MgZ   .29779  .26179 .60896 .301  .0045
SiT   .19001  .18832      0 .981  .0041
AlT   .19001  .18832      0 .019  .0041
B     .10977  .21954  .4543       .0045
O1W        0       0  .7652 .609  .0054
F1W        0       0  .7652 .381  .0054
OH1W       0       0  .7652 .009  .0054
O2    .06021  .12042  .4891       .0059
O3V    .2564   .1282  .5098       .0088
O4    .09250  .18500  .0717       .0090
O5     .1824   .0912  .0913       .0086
O6    .19138  .18214  .7802       .0063
O7    .28320  .28263  .0737       .0081
O8    .20739  .26778  .4377       .0093
H3V     .259   .1295    .39         .14