Biotite
Brigatti M F, Galli E, Poppi L
American Mineralogist 76 (1991) 1174-1183
Effect of Ti substitution in biotite-M crystal chemistry
Sample 17 from a quartz diorite, Capo Vaticano, Italy
_database_code_amcsd 0001387
5.323 9.215 10.210 90 100.14 90 C2/m
atom     x     y     z  occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Si   .0759 .1664 .2268 .691  .0056  .0033  .0035 -.0002  .0020  .0001
Al   .0759 .1664 .2268 .309  .0056  .0033  .0035 -.0002  .0020  .0001
K        0    .5     0 .914  .0212  .0095  .0106      0  .0050      0
Ca       0    .5     0 .001  .0212  .0095  .0106      0  .0050      0
Na       0    .5     0 .022  .0212  .0095  .0106      0  .0050      0
Mg1      0     0    .5 .415  .0073  .0023  .0033      0  .0010      0
Al1      0     0    .5 .064  .0073  .0023  .0033      0  .0010      0
Cr1      0     0    .5 .002  .0073  .0023  .0033      0  .0010      0
Fe1      0     0    .5 .432  .0073  .0023  .0033      0  .0010      0
Mn1      0     0    .5 .003  .0073  .0023  .0033      0  .0010      0
Ti1      0     0    .5 .066  .0073  .0023  .0033      0  .0010      0
Mg2      0 .3327    .5 .415  .0075  .0022  .0031      0  .0020      0
Al2      0 .3327    .5 .064  .0075  .0022  .0031      0  .0020      0
Cr2      0 .3327    .5 .002  .0075  .0022  .0031      0  .0020      0
Fe2      0 .3327    .5 .432  .0075  .0022  .0031      0  .0020      0
Mn2      0 .3327    .5 .003  .0075  .0022  .0031      0  .0020      0
Ti2      0 .3327    .5 .066  .0075  .0022  .0031      0  .0020      0
O1   .0145     0 .1712       .0188  .0049  .0098      0  .0035      0
O2   .3249 .2298 .1697       .0132  .0064  .0093 -.0008  .0036  .0001
O3   .1302 .1671 .3904       .0066  .0033  .0023 -.0014  .0014  .0008
O4   .1293    .5 .3954       .0162  .0045  .0004      0  .0000      0