Fluor-dravite
Bosi F, Lucchesi S
European Journal of Mineralogy 16 (2004) 335-344
Crystal chemistry of the schorl-dravite series
Note: Tourmaline TM504c
Locality: Olkhon (Lake Baikal), Siberia
_database_code_amcsd 0007049
15.9706 15.9706 7.2276 90 90 120 R3m
atom       x       y      z  occ
NaX        0       0 .22556 .477
CaX        0       0 .22556 .412
KX         0       0 .22556 .015
MgY   .12391 .061955 .63460 .552
AlY   .12391 .061955 .63460 .210
V3+Y  .12391 .061955 .63460 .191
Cr3+Y .12391 .061955 .63460 .032
Ti4+Y .12391 .061955 .63460 .009
ZnY   .12391 .061955 .63460 .005
Fe2+Y .12391 .061955 .63460 .002
Mn2+Y .12391 .061955 .63460 .001
AlZ   .29797  .26170 .61193 .757
MgZ   .29797  .26170 .61193 .188
V3+Z  .29797  .26170 .61193 .043
Cr3+Z .29797  .26170 .61193 .012
SiT   .19155  .18983      0 .985
AlT   .19155  .18983      0 .015
B     .10997  .21994 .45295
O1W        0       0 .77105 .437
F1W        0       0 .77105 .314
OH1W       0       0 .77105 .248
O2    .06065  .12130 .48040
OH3V  .26391 .131955 .51134
O4    .09247  .18494 .07196
O5    .18241 .091205 .09172
O6    .19466  .18554 .77861
O7    .28469  .28413 .07913
O8    .20900  .26985 .44107