Sanidine
Phillips M W, Ribbe P H
American Mineralogist 58 (1973) 263-270
The structures of monoclinic potassium-rich feldspars
Locality:  Laacher See, Eifel District, Germany
_database_code_amcsd 0000312
8.539 13.015 7.179 90 115.99 90 C2/m
atom      x     y     z occ B(1,1) B(2,2) B(3,3)  B(1,2) B(1,3)  B(2,3)
Si1   .0094 .1843 .2239 .71  .0031  .0011  .0037  -.0004  .0014  -.0002
Al1   .0094 .1843 .2239 .29  .0031  .0011  .0037  -.0004  .0014  -.0002
Si2   .7079 .1177 .3444 .79  .0028  .0008  .0040  -.0001  .0012  -.0001
Al2   .7079 .1177 .3444 .21  .0028  .0008  .0040  -.0001  .0012  -.0001
K     .2839     0 .1366 .85  .0064  .0036  .0131       0  .0029       0
Na    .2839     0 .1366 .15  .0064  .0036  .0131       0  .0029       0
OA(1)     0 .1461     0      .0086  .0019  .0088       0  .0045       0
OA(2) .6330     0 .2851      .0066  .0013  .0098       0  .0016       0
OB    .8276 .1453 .2256      .0070  .0033  .0118  -.0008  .0052   .0001
OC    .0330 .3103 .2572      .0053  .0017  .0091  -.0005  .0022  -.0006
OD    .1813 .1265 .4038      .0066  .0021  .0076   .0002  .0018   .0002