Biotite
Brigatti M F, Galli E, Poppi L
American Mineralogist 76 (1991) 1174-1183
Effect of Ti substitution in biotite-M crystal chemistry
Sample 11 from a lamproite rock, Jummilla, Spain
_database_code_amcsd 0001383
5.315 9.204 10.168 90 100.13 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   .0749 .1669 .2255 .717  .0062  .0022  .0026  .0000  .0009  .0000
Al   .0749 .1669 .2255 .283  .0062  .0022  .0026  .0000  .0009  .0000
K        0    .5     0 .955  .0222  .0080  .0072      0  .0022      0
Ca       0    .5     0 .013  .0222  .0080  .0072      0  .0022      0
Na       0    .5     0 .030  .0222  .0080  .0072      0  .0022      0
Mg1      0     0    .5 .633  .0080  .0027  .0038      0  .0015      0
Al1      0     0    .5 .050  .0080  .0027  .0038      0  .0015      0
Cr1      0     0    .5 .024  .0080  .0027  .0038      0  .0015      0
Fe1      0     0    .5 .168  .0080  .0027  .0038      0  .0015      0
Mn1      0     0    .5 .009  .0080  .0027  .0038      0  .0015      0
Ti1      0     0    .5 .108  .0080  .0027  .0038      0  .0015      0
Mg2      0 .3364    .5 .633  .0070  .0042  .0034      0  .0010      0
Al2      0 .3364    .5 .050  .0070  .0042  .0034      0  .0010      0
Cr2      0 .3364    .5 .024  .0070  .0042  .0034      0  .0010      0
Fe2      0 .3364    .5 .168  .0070  .0042  .0034      0  .0010      0
Mn2      0 .3364    .5 .009  .0070  .0042  .0034      0  .0010      0
Ti2      0 .3364    .5 .108  .0070  .0042  .0034      0  .0010      0
O1   .0212     0 .1683       .0188  .0035  .0035      0  .0004      0
O2   .3230 .2327 .1674       .0126  .0062  .0033 -.0023  .0017 -.0006
O3   .1310 .1676 .3911       .0078  .0029  .0028  .0001  .0010 -.0001
O4   .1312    .5 .3998       .0075  .0028  .0031      0  .0013      0