Biotite
Bigi S, Brigatti M F
American Mineralogist 79 (1994) 63-72
Crystal chemistry and microstructures of plutonic biotite
Sample 2M1 from Valle del Cervo syenitic complex
_database_code_amcsd 0001634
5.339 9.249 20.196 90 95.06 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)
SiT1 .4615 .2498 .1370 .696  .0074  .0023  .0007  .0003  .0002  .0001
AlT1 .4615 .2498 .1370 .304  .0074  .0023  .0007  .0003  .0002  .0001
SiT2 .9636 .4166 .1371 .696  .0076  .0024  .0007  .0005  .0002  .0001
AlT2 .9636 .4166 .1371 .304  .0076  .0024  .0007  .0005  .0002  .0001
Fe1    .75   .25     0 .405  .0069  .0031  .0008 -.0008  .0003 -.0004
Mg1    .75   .25     0 .515  .0069  .0031  .0008 -.0008  .0003 -.0004
Mn1    .75   .25     0 .006  .0069  .0031  .0008 -.0008  .0003 -.0004
Ti1    .75   .25     0 .075  .0069  .0031  .0008 -.0008  .0003 -.0004
Fe2  .2473 .0825 .0000 .405  .0112  .0033  .0008 -.0003  .0004 -.0003
Mg2  .2473 .0825 .0000 .515  .0112  .0033  .0008 -.0003  .0004 -.0003
Mn2  .2473 .0825 .0000 .006  .0112  .0033  .0008 -.0003  .0004 -.0003
Ti2  .2473 .0825 .0000 .075  .0112  .0033  .0008 -.0003  .0004 -.0003
K        0 .0852   .25 .946  .0238  .0081  .0021      0  .0007      0
Na       0 .0852   .25 .032  .0238  .0081  .0021      0  .0007      0
O11  .7385 .3176 .1656       .0129  .0051  .0011 -.0015  .0004 -.0001
O21  .2368 .3478 .1665       .0143  .0044  .0011  .0010  .0000 -.0001
O22  .4418 .0844 .1662       .0165  .0038  .0011  .0007  .0007 -.0003
O31  .4324 .2376 .0550       .0082  .0006  .0005 -.0002  .0000 -.0001
O32  .9359 .4047 .0550       .0098  .0022  .0006  .0002  .0004 -.0002
O4   .9351 .0695 .0518       .0103  .0019  .0009  .0010  .0005 -.0005