Annite
Brigatti M F, Frigieri P, Ghezzo c, Poppi L
American Mineralogist 85 (2000) 436-448
Crystal chemistry of Al-rich biotites coexisting with muscovites in
peraluminous granites
Sample: GFS15a
Locality: Sos Canales pluton, Sardinia Island, Italy
_database_code_amcsd 0002386
5.339 9.232 10.208 90 100.30 90 C2/m
atom      x      y      z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3)  U(2,3)
KA        0     .5      0 .96  .0283  .0103  .0086      0 .00345       0
NaA       0     .5      0 .02  .0283  .0103  .0086      0 .00345       0
CaA       0     .5      0 .03  .0283  .0103  .0086      0 .00345       0
BaA       0     .5      0 .01  .0283  .0103  .0086      0 .00345       0
Fe2+1     0      0     .5 .66  .0085  .0028  .0043      0  .0028       0
Mg1       0      0     .5 .17  .0085  .0028  .0043      0  .0028       0
Fe2+2     0  .3331     .5 .36  .0069 .00306 .00391      0  .0018       0
Mg2       0  .3331     .5 .28  .0069 .00306 .00391      0  .0018       0
Ti2       0  .3331     .5 .07  .0069 .00306 .00391      0  .0018       0
Al2       0  .3331     .5 .29  .0069 .00306 .00391      0  .0018       0
SiT   .0758 .16694 .22642 .67  .0085 .00367 .00387 -.0001  .0022   .0001
AlT   .0758 .16694 .22642 .33  .0085 .00367 .00387 -.0001  .0022   .0001
O1    .0162      0  .1700      .0200  .0049 .00567      0  .0009       0
O2    .3264  .2315  .1692      .0163  .0078  .0056 -.0027  .0039  -.0004
O3    .1322  .1685  .3920      .0173  .0051  .0040  .0002  .0021   .0000
OH4   .1285     .5  .3969 .78  .0156  .0058  .0039      0  .0024       0
O4    .1285     .5  .3969 .06  .0156  .0058  .0039      0  .0024       0
F4    .1285     .5  .3969 .16  .0156  .0058  .0039      0  .0024       0