Biotite
Bohlen S R, Peacor D R, Essene E J
American Mineralogist 65 (1980) 55-62
Crystal chemistry of a metamorphic biotite and its significance in water
barometry
Locality: Au Sable Forks, New York
_database_code_amcsd 0000756
5.357 9.245 20.234 90 94.978 90 C2/c
atom     x     y     z  occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
K        0 .0844   .25      0.0232 0.0071 0.0016      0 0.0007      0
Fe1    .75   .25     0 .464 0.0072 0.0019 0.0006 -.0007 0.0006 -.0001
Mg1    .75   .25     0 .387 0.0072 0.0019 0.0006 -.0007 0.0006 -.0001
Ti1    .75   .25     0 .092 0.0072 0.0019 0.0006 -.0007 0.0006 -.0001
Fe2  .2480 .0826     0 .464 0.0092 0.0022 0.0006 -.0004 0.0005      0
Mg2  .2480 .0826     0 .387 0.0092 0.0022 0.0006 -.0004 0.0005      0
Ti2  .2480 .0862     0 .092 0.0092 0.0022 0.0006 -.0004 0.0005      0
Si1  .4625 .2508 .1373 .698 0.0066 0.0019 0.0003 -.0002 0.0005 0.0001
Al1  .4625 .2508 .1373 .302 0.0066 0.0019 0.0003 -.0002 0.0005 0.0001
Si2  .9630 .4175 .1375 .698 0.0071 0.0020 0.0005 -.0001 0.0005 0.0000
Al2  .9630 .4175 .1375 .302 0.0071 0.0020 0.0005 -.0001 0.0005 0.0000
O1   .7341 .3201 .1656      0.0133 0.0075 0.0006 -.0041 0.0005 0.0003
O2   .2368 .3476 .1659      0.0147 0.0064 0.0007 0.0030 0.0000 -.0002
O3   .4459 .0836 .1660      0.0237 0.0030 0.0007 0.0012 0.0014 0.0001
O4   .4323 .2395 .0544      0.0080 0.0011 0.0008 -.0020 0.0004 0.0002
O5   .9361 .4073 .0545      0.0113 0.0016 0.0004 -.0006 0.0005 0.0003
O6   .9367 .0709 .0537      0.0136 0.0002 0.0019 0.0002 0.0012 0.0004