Orthoclase
Phillips M W, Ribbe P H
American Mineralogist 58 (1973) 263-270
The structures of monoclinic potassium-rich feldspars
Note: variety adularia
Locality: St. Gotthard, Switzerland
_database_code_amcsd 0000313
8.545 12.967 7.201 90 116.00 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   .0093 .1842 .2243 .60  .0041  .0013  .0050  -.0003  .0022  -.0003
Al1   .0093 .1842 .2243 .40  .0041  .0013  .0050  -.0003  .0022  -.0003
Si2   .7078 .1176 .3445 .89  .0033  .0009  .0049       0  .0018   .0002
Al2   .7078 .1176 .3445 .11  .0033  .0009  .0049       0  .0018   .0002
K     .2834     0 .1372 .88  .0065  .0036  .0128       0  .0030       0
Na    .2834     0 .1372 .12  .0065  .0036  .0128       0  .0030       0
OA(1)     0 .1447     0      .0081  .0021  .0115       0  .0049       0
OA(2) .6339     0 .2848      .0065  .0014  .0096       0  .0017       0
OB    .8262 .1449 .2280      .0077  .0033  .0125  -.0005  .0063   .0002
OC    .0339 .3117 .2585      .0057  .0018  .0095  -.0006  .0026  -.0006
OD    .1821 .1257 .4070      .0069  .0020  .0071   .0001  .0019   .0004