Fluor-dravite
Grice J D, Ercit T S
Neues Jahrbuch fur Mineralogie, Abhandlungen 165 (1993) 245-266
Ordering of Fe and Mg in the tourmaline crystal structure: The correct formula
Sample: Dravite 32008
Locality: Bronson Station, Hastings Co., Ontario, Canada
_database_code_amcsd 0018790
15.981 15.981 7.210 90 90 120 R3m
atom      x      y     z   occ  Uiso
NaX       0      0 .2271   .55 .0169
CaX       0      0 .2271   .35 .0169
MgY  .12388 .06194 .6334   .63 .0076
LiY  .12388 .06194 .6334  .013 .0076
Fe2Y .12388 .06194 .6334   .15 .0076
Fe3Y .12388 .06194 .6334 .2033 .0076
AlZ  .29802 .26169 .6124 .9117 .0049
FeZ  .29802 .26169 .6124 .0067 .0049
MgZ  .29802 .26169 .6124 .0767 .0049
TiZ  .29802 .26169 .6124  .005 .0049
SiT  .19178 .19007     0 .9967 .0047
TiT  .19178 .19007     0 .0033 .0047
B     .1098  .2196 .4531       .0070
F1        0      0 .7766   .44 .0156
OH1       0      0 .7766   .21 .0156
O1        0      0 .7766   .35 .0156
O2   .06095  .1219 .4782       .0101
O3   .26726 .13363 .5122       .0111
O4   .09254 .18508 .0706       .0091
O5    .1828 .09140 .0913       .0096
O6    .1962  .1869 .7779       .0084
O7   .28486 .28434 .0802       .0083
O8    .2095  .2702 .4422       .0094
H3     .260   .130  .409       .0100