Biotite
Brigatti M F, Galli E, Poppi L
American Mineralogist 76 (1991) 1174-1183
Effect of Ti substitution in biotite-M crystal chemistry
Sample 8 from a lamproite rock, Puebla De Mula, Spain
_database_code_amcsd 0001380
5.317 9.207 10.232 90 99.98 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   .0756 .1668 .2269 .714  .0086  .0032  .0033  .0001  .0011 -.0001
Al   .0756 .1668 .2269 .286  .0086  .0032  .0033  .0001  .0011 -.0001
K        0    .5     0 .955  .0275  .0094  .0072      0  .0024      0
Ca       0    .5     0 .030  .0275  .0094  .0072      0  .0024      0
Na       0    .5     0 .015  .0275  .0094  .0072      0  .0024      0
Mg1      0     0    .5 .722  .0073  .0025  .0036      0  .0013      0
Al1      0     0    .5 .075  .0073  .0025  .0036      0  .0013      0
Cr1      0     0    .5 .016  .0073  .0025  .0036      0  .0013      0
Fe1      0     0    .5 .130  .0073  .0025  .0036      0  .0013      0
Mn1      0     0    .5 .007  .0073  .0025  .0036      0  .0013      0
Ti1      0     0    .5 .048  .0073  .0025  .0036      0  .0013      0
Mg2      0 .3347    .5 .722  .0093  .0044  .0043      0  .0013      0
Al2      0 .3347    .5 .075  .0093  .0044  .0043      0  .0013      0
Cr2      0 .3347    .5 .016  .0093  .0044  .0043      0  .0013      0
Fe2      0 .3347    .5 .130  .0093  .0044  .0043      0  .0013      0
Mn2      0 .3347    .5 .007  .0093  .0044  .0043      0  .0013      0
Ti2      0 .3347    .5 .048  .0093  .0044  .0043      0  .0013      0
O1   .0171     0 .1697       .0205  .0052  .0041      0  .0000      0
O2   .3256 .2311 .1692       .0167  .0066  .0041 -.0025  .0019 -.0005
O3   .1313 .1673 .3914       .0118  .0033  .0034 -.0001  .0012  .0001
O4   .1311    .5 .3979       .0090  .0041  .0040      0  .0014      0