Biotite
Brigatti M F, Galli E, Poppi L
American Mineralogist 76 (1991) 1174-1183
Effect of Ti substitution in biotite-M crystal chemistry
Sample 16 from a monzonite-alkali syenite, Sande caldron, Norway
_database_code_amcsd 0001386
5.333 9.256 10.186 90 100.17 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   .0747 .1669 .2254 .708  .0078  .0026  .0053  .0003  .0010  .0000
Al   .0747 .1669 .2254 .292  .0078  .0026  .0053  .0003  .0010  .0000
K        0    .5     0 .968  .0267  .0092  .0124      0  .0025      0
Ca       0    .5     0 .009  .0267  .0092  .0124      0  .0025      0
Na       0    .5     0 .020  .0267  .0092  .0124      0  .0025      0
Mg1      0     0    .5 .467  .0112  .0030  .0049      0  .0010      0
Al1      0     0    .5 .027  .0112  .0030  .0049      0  .0010      0
Cr1      0     0    .5 .002  .0112  .0030  .0049      0  .0010      0
Fe1      0     0    .5 .413  .0112  .0030  .0049      0  .0010      0
Mn1      0     0    .5 .008  .0112  .0030  .0049      0  .0010      0
Ti1      0     0    .5 .077  .0112  .0030  .0049      0  .0010      0
Mg2      0 .3353    .5 .467  .0097  .0046  .0050      0  .0008      0
Al2      0 .3353    .5 .027  .0097  .0046  .0050      0  .0008      0
Cr2      0 .3353    .5 .002  .0097  .0046  .0050      0  .0008      0
Fe2      0 .3353    .5 .413  .0097  .0046  .0050      0  .0008      0
Mn2      0 .3353    .5 .008  .0097  .0046  .0050      0  .0008      0
Ti2      0 .3353    .5 .077  .0097  .0046  .0050      0  .0008      0
O1   .0297     0 .1678       .0283  .0036  .0074      0  .0010      0
O2   .3201 .2368 .1678       .0202  .0066  .0065 -.0027  .0008 -.0002
O3   .1310 .1679 .3905       .0112  .0032  .0050  .0000  .0013 -.0001
O4   .1291    .5 .3952       .0155  .0043  .0048      0 -.0002      0