Biotite
Brigatti M F, Galli E, Poppi L
American Mineralogist 76 (1991) 1174-1183
Effect of Ti substitution in biotite-M crystal chemistry
Sample 10 from a lamproite rock, Fortuna, Spain
_database_code_amcsd 0001382
5.322 9.228 10.102 90 100.25 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   .0743 .1670 .2232 .733  .0067  .0020  .0040 -.0001  .0008 -.0001
Al   .0743 .1670 .2232 .267  .0067  .0020  .0040 -.0001  .0008 -.0001
K        0    .5     0 .958  .0235  .0070  .0075      0  .0019      0
Ca       0    .5     0 .004  .0235  .0070  .0075      0  .0019      0
Na       0    .5     0 .016  .0235  .0070  .0075      0  .0019      0
Mg1      0     0    .5 .534  .0081  .0022  .0050      0  .0013      0
Al1      0     0    .5 .031  .0081  .0022  .0050      0  .0013      0
Cr1      0     0    .5 .018  .0081  .0022  .0050      0  .0013      0
Fe1      0     0    .5 .196  .0081  .0022  .0050      0  .0013      0
Mn1      0     0    .5 .010  .0081  .0022  .0050      0  .0013      0
Ti1      0     0    .5 .174  .0081  .0022  .0050      0  .0013      0
Mg2      0 .3353    .5 .534  .0071  .0038  .0044      0  .0013      0
Al2      0 .3353    .5 .031  .0071  .0038  .0044      0  .0013      0
Cr2      0 .3353    .5 .018  .0071  .0038  .0044      0  .0013      0
Fe2      0 .3353    .5 .196  .0071  .0038  .0044      0  .0013      0
Mn2      0 .3353    .5 .010  .0071  .0038  .0044      0  .0013      0
Ti2      0 .3353    .5 .174  .0071  .0038  .0044      0  .0013      0
O1   .0291     0 .1673       .0246  .0034  .0047      0  .0002      0
O2   .3187 .2368 .1663       .0149  .0064  .0039 -.0020  .0005 -.0003
O3   .1321 .1687 .3907       .0100  .0022  .0042 -.0004  .0009 -.0001
O4   .1308    .5 .4007       .0065  .0030  .0045      0  .0026      0