Muscovite
Richardson S M, Richardson J W
American Mineralogist 67 (1982) 69-75
Crystal structure of a pink muscovite from Archer's Post, Kenya: Implications
for reverse pleochroism in dioctahedral micas
_database_code_amcsd 0000854
5.1988 9.0266 20.1058 90 95.782 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 .0992   .25     0.0188 0.0084 .00199      0 .00092      0
Si1  .4510 .2587 .1355 .75 0.0114 0.0047 0.0015 -.0005  .0008  .0002
Al1  .4510 .2587 .1355 .25 0.0115 0.0047 0.0015 -.0005  .0008  .0002
Si2  .0354 .4298 .3646 .75 0.0100 0.0051 0.0014 -.0010  .0006 -.0001
Al2  .0354 .4298 .3646 .25 0.0100 0.0051 0.0014 -.0010  .0006 -.0001
Al3  .2506 .0838 .0002     0.0073 0.0045 0.0013  .0000  .0002  .0002
O1   .3872 .2525 .0543     0.0173 0.0068 0.0017 -.0010  .0012  .0000
O2   .0366 .4431 .4459     0.0159 0.0066 0.0017  .0016  .0003  .0008
O3   .4178 .0931 .1685     0.0257 0.0084 0.0017  .0004  .0012  .0001
O4   .2475 .3712 .1685     0.0154 0.0088 0.0020  .0017  .0004  .0003
O5   .2509 .3132 .3424     0.0196 0.0095 0.0023  .0009  .0004 -.0007
OH6  .0422 .0622 .4492     0.0196 0.0081 0.0018 -.0018  .0010  .0001