Povondraite
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: Povondraite 144478
Locality: San Francisco mine, Villa Tu nari, Bolivia
_database_code_amcsd 0018783
16.186 16.186 7.444 90 90 120 R3m
atom      x      y     z   occ  Uiso
NaX       0      0  .228   .79 .0273
KX        0      0  .228   .26 .0273
MgY  .12238 .06119 .6430 .0167 .0064
Fe2Y .12238 .06119 .6430 .1433 .0064
VY   .12238 .06119 .6430 .0033 .0064
Fe3Y .12238 .06119 .6430 .8367 .0064
AlZ   .2987  .2627 .6124 .0533 .0057
Fe3Z  .2987  .2627 .6124 .6467 .0057
MgZ   .2987  .2627 .6124    .3 .0057
SiT   .1892  .1876     0   .99 .0061
BT    .1892  .1876     0   .01 .0061
B     .1097  .2194  .456       .0086
O1        0      0  .772   .70 .0073
OH1       0      0  .772   .30 .0073
O2    .0609  .1218  .491       .0094
O3    .2578  .1289  .513       .0088
O4    .0924  .1848  .069       .0108
O5    .1826  .0913  .087       .0099
O6    .1923  .1829  .784       .0081
O7    .2810  .2813  .075       .0096
O8    .2069  .2678  .442       .0101
H3     .242   .121   .41       .0100