Dravite
Vereshchagin O S, Rozhdestvenskaya I V, Frank-Kamenetskaya O V, Zolotarev A A
European Journal of Mineralogy 26 (2014) 309-321
Ion substitutions and structural adjustment in Cr-bearing tourmalines
Note: Sample 1
Locality: Shabrovskoe ore district, Middle Urals, Russia
_database_code_amcsd 0020154
15.926 15.926 7.210 90 90 120 R3m
atom      x      y     z occ  Uiso
CaX       0      0 .2300 .06 .0197
NaX       0      0 .2300 .64 .0197
AlY  .12375 .06188 .6359 .62 .0059
CrY  .12375 .06188 .6359 .08 .0059
FeY  .12375 .06188 .6359 .02 .0059
MgY  .12375 .06188 .6359 .28 .0059
AlZ  .29791 .26162 .6110 .62 .0041
CrZ  .29791 .26162 .6110 .08 .0041
FeZ  .29791 .26162 .6110 .02 .0041
MgZ  .29791 .26162 .6110 .28 .0041
SiT  .19143 .18963     0 .98 .0049
AlT  .19143 .18963     0 .02 .0049
B     .1097  .2194 .4546     .0081
OHw       0      0 .7690 .99  .012
O1w       0      0 .7690 .01  .012
O2   .06065 .12130 .4884     .0110
OHv   .2598  .1299 .5116 .99 .0121
O3v   .2598  .1299 .5116 .01 .0121
O4    .0931  .1862 .0716     .0119
O5    .1838  .0919 .0929     .0106
O6    .1941  .1845 .7781     .0089
O7    .2849  .2848 .0780     .0088
O8    .2088  .2695 .4406     .0110