Biotite
Brigatti M F, Galli E, Poppi L
American Mineralogist 76 (1991) 1174-1183
Effect of Ti substitution in biotite-M crystal chemistry
Sample 12 from a lamproite rock, Jummilla, Spain
_database_code_amcsd 0001384
5.314 9.190 10.160 90 100.18 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   .0750 .1668 .2258 .726  .0071  .0038  .0034  .0001  .0011  .0001
Al   .0750 .1668 .2258 .274  .0071  .0038  .0034  .0001  .0011  .0001
K        0    .5     0 .947  .0239  .0093  .0080      0  .0027      0
Ca       0    .5     0 .002  .0239  .0093  .0080      0  .0027      0
Na       0    .5     0 .051  .0239  .0093  .0080      0  .0027      0
Mg1      0     0    .5 .696  .0085  .0046  .0045      0  .0017      0
Al1      0     0    .5 .013  .0085  .0046  .0045      0  .0017      0
Cr1      0     0    .5 .018  .0085  .0046  .0045      0  .0017      0
Fe1      0     0    .5 .166  .0085  .0046  .0045      0  .0017      0
Mn1      0     0    .5 .006  .0085  .0046  .0045      0  .0017      0
Ti1      0     0    .5 .089  .0085  .0046  .0045      0  .0017      0
Mg2      0 .3357    .5 .696  .0079  .0054  .0040      0  .0015      0
Al2      0 .3357    .5 .013  .0079  .0054  .0040      0  .0015      0
Cr2      0 .3357    .5 .018  .0079  .0054  .0040      0  .0015      0
Fe2      0 .3357    .5 .166  .0079  .0054  .0040      0  .0015      0
Mn2      0 .3357    .5 .006  .0079  .0054  .0040      0  .0015      0
Ti2      0 .3357    .5 .089  .0079  .0054  .0040      0  .0015      0
O1   .0214     0 .1686       .0202  .0053  .0043      0  .0014      0
O2   .3225 .2330 .1677       .0138  .0072  .0044 -.0025  .0021 -.0004
O3   .1307 .1674 .3910       .0081  .0048  .0036  .0001  .0012 -.0001
O4   .1311    .5 .3995       .0070  .0049  .0039      0  .0014      0