Biotite
Brigatti M F, Galli E, Poppi L
American Mineralogist 76 (1991) 1174-1183
Effect of Ti substitution in biotite-M crystal chemistry
Sample 15 from a alkaline gabbro-peralkaline syenite rock, Mt St Hilaire, Quebec
_database_code_amcsd 0001385
5.329 9.235 10.190 90 100.20 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   .0742 .1671 .2250 .684  .0076  .0019  .0024  .0000  .0008 -.0001
Al   .0742 .1671 .2250 .316  .0076  .0019  .0024  .0000  .0008 -.0001
K        0    .5     0 .915  .0236  .0073  .0078      0  .0022      0
Ca       0    .5     0 .007  .0236  .0073  .0078      0  .0022      0
Na       0    .5     0 .015  .0236  .0073  .0078      0  .0022      0
Mg1      0     0    .5 .492  .0088  .0019  .0029      0  .0015      0
Al1      0     0    .5 .002  .0088  .0019  .0029      0  .0015      0
Cr1      0     0    .5 .002  .0088  .0019  .0029      0  .0015      0
Fe1      0     0    .5 .314  .0088  .0019  .0029      0  .0015      0
Mn1      0     0    .5 .008  .0088  .0019  .0029      0  .0015      0
Ti1      0     0    .5 .130  .0088  .0019  .0029      0  .0015      0
Mg2      0 .3368    .5 .492  .0064  .0028  .0027      0  .0006      0
Al2      0 .3368    .5 .002  .0064  .0028  .0027      0  .0006      0
Cr2      0 .3368    .5 .002  .0064  .0028  .0027      0  .0006      0
Fe2      0 .3368    .5 .314  .0064  .0028  .0027      0  .0006      0
Mn2      0 .3368    .5 .008  .0064  .0028  .0027      0  .0006      0
Ti2      0 .3368    .5 .130  .0064  .0028  .0027      0  .0006      0
O1   .0174     0 .1691       .0194  .0033  .0043      0  .0007      0
O2   .3243 .2311 .1678       .0145  .0056  .0033 -.0010  .0018 -.0007
O3   .1307 .1683 .3910       .0090  .0029  .0024 -.0006  .0004  .0004
O4   .1293    .5 .3964       .0108  .0034  .0028      0  .0010      0