Dravite
Bosi F, Lucchesi S
European Journal of Mineralogy 16 (2004) 335-344
Crystal chemistry of the schorl-dravite series
Note: Tourmaline TM112c
Locality: Haddam, Connecticut, U.S.A.
_database_code_amcsd 0007043
15.9636 15.9636 7.1911 90 90 120 R3m
atom       x      y      z  occ
NaX        0      0 .22873 .559
CaX        0      0 .22873 .263
KX         0      0 .22873 .003
MgY   .12446 .06223 .63246 .422
AlY   .12446 .06223 .63246 .310
Fe2+Y .12446 .06223 .63246 .175
Fe3+Y .12446 .06223 .63246 .062
Ti4+Y .12446 .06223 .63246 .020
Cr3+Y .12446 .06223 .63246 .005
Mn2+Y .12446 .06223 .63246 .003
V3+Y  .12446 .06223 .63246 .003
AlZ   .29812 .26166 .61182 .858
MgZ   .29812 .26166 .61182 .128
Fe3+Z .29812 .26166 .61182 .014
Fe2+Z .29812 .26166 .61182 .001
SiT   .19192 .19007      0 .980
AlT   .19192 .19007      0 .020
B     .10997 .21994 .45436
O1W        0      0 .77608 .471
OH1W       0      0 .77608 .469
F1W        0      0 .77608 .060
O2    .06085 .12170 .48238
OH3V  .26640 .13320 .51091
O4    .09281 .18562 .07047
O5    .18380 .09190 .09190
O6    .19628 .18640 .77711
O7    .28513 .28494 .08001
O8    .20952 .27023 .44110