Biotite
Brigatti M F, Galli E, Poppi L
American Mineralogist 76 (1991) 1174-1183
Effect of Ti substitution in biotite-M crystal chemistry
Sample 9 from a lamproite rock, Cancarix, Spain
_database_code_amcsd 0001381
5.306 9.190 10.163 90 100.11 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   .0753 .1668 .2258 .727  .0090  .0028  .0028 -.0001  .0010 -.0001
Al   .0753 .1668 .2258 .273  .0090  .0028  .0028 -.0001  .0010 -.0001
K        0    .5     0 .952  .0257  .0087  .0071      0  .0022      0
Ca       0    .5     0 .006  .0257  .0087  .0071      0  .0022      0
Na       0    .5     0 .024  .0257  .0087  .0071      0  .0022      0
Mg1      0     0    .5 .808  .0108  .0037  .0043      0  .0016      0
Cr1      0     0    .5 .008  .0108  .0037  .0043      0  .0016      0
Fe1      0     0    .5 .094  .0108  .0037  .0043      0  .0016      0
Mn1      0     0    .5 .005  .0108  .0037  .0043      0  .0016      0
Ti1      0     0    .5 .059  .0108  .0037  .0043      0  .0016      0
Mg2      0 .3353    .5 .808  .0089  .0042  .0035      0  .0010      0
Cr2      0 .3353    .5 .008  .0089  .0042  .0035      0  .0010      0
Fe2      0 .3353    .5 .094  .0089  .0042  .0035      0  .0010      0
Mn2      0 .3353    .5 .005  .0089  .0042  .0035      0  .0010      0
Ti2      0 .3353    .5 .059  .0089  .0042  .0035      0  .0010      0
O1   .0220     0 .1682       .0221  .0042  .0038      0  .0013      0
O2   .3222 .2334 .1672       .0157  .0068  .0038 -.0020  .0019 -.0005
O3   .1309 .1672 .3911       .0098  .0039  .0030  .0000  .0007 -.0002
O4   .1317    .5 .4006       .0088  .0033  .0031      0  .0007      0