Muscovite-2M1
Brigatti M F, Frigieri P, Poppi L
American Mineralogist 83 (1998) 775-785
Crystal chemistry of Mg-, Fe-bearing muscovites-2M1
Sample A4b from peraluminous granites at Sardinia, Italy
_database_code_amcsd 0002015
5.186 8.991 20.029 90 95.77 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  .0988     .25 .92  .0181  .0070 .00159      0 .00077       0
Na       0  .0988     .25 .08  .0181  .0070 .00159      0 .00077       0
Si1  .4511 .25862  .13549 .73  .0070 .00290 .00089  .0004 .00031  .00006
Al1  .4511 .25862  .13549 .27  .0070 .00290 .00089  .0004 .00031  .00006
Si2  .9649 .43006  .13547 .73  .0066 .00280 .00091  .0001 .00041  .00007
Al2  .9649 .43006  .13547 .27  .0066 .00280 .00091  .0001 .00041  .00007
Ti2  .2500 .08358 -.00001 .01  .0069 .00278 .00090  .0000 .00037  .00010
Fe2  .2500 .08358 -.00001 .04  .0069 .00278 .00090  .0000 .00037  .00010
Mg2  .2500 .08358 -.00001 .03  .0069 .00278 .00090  .0000 .00037  .00010
Al2  .2500 .08358 -.00001 .92  .0069 .00278 .00090  .0000 .00037  .00010
Al1    .75    .25       0 .04
O11  .7512  .3110   .1578      .0108  .0052 .00137 -.0014  .0003  .00031
O21  .2506  .3703   .1690      .0113  .0056 .00114  .0018  .0006 -.00001
O22  .4184  .0936  .16844      .0126  .0046 .00123 -.0007  .0008  .00001
O31  .3864  .2510  .05367      .0062  .0035 .00100  .0005  .0002  .00011
O32  .9618  .4434  .05378      .0083  .0037 .00093  .0012  .0004  .00002
O4   .9576  .0622  .05022 .99  .0111  .0036 .00105  .0000  .0008 -.00011
F4   .9576  .0622  .05022 .01  .0111  .0036 .00105  .0000  .0008 -.00011