Sanidine
Keefer K D, Brown G E
American Mineralogist 63 (1978) 1264-1273
Crystal structure and composition of sanidine and high albite in cryptoperthitic
intergrowth
Note this sample of feldspar is from the
Rabb Canyon pegmatite, Grant County, New Mexico, USA
_database_code_amcsd 0000695
8.558 12.997 7.179 90 116.07 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)
K    .2844     0 .1383 .65  .0051  .0045  .0118      0  .0023      0
Na   .2844     0 .1383 .35  .0051  .0045  .0118      0  .0023      0
Si1  .0091 .1834 .2236 .75  .0049  .0019  .0035 -.0004  .0022 -.0002
Al1  .0091 .1834 .2236 .25  .0049  .0019  .0035 -.0004  .0022 -.0002
Si2  .7069 .1177 .3431 .75  .0046  .0014  .0045 -.0001  .0020      0
Al2  .7069 .1177 .3431 .25  .0046  .0014  .0045 -.0001  .0020      0
Oa1      0 .1443     0      .0104  .0031  .0076      0  .0050      0
Oa2  .6308     0 .2832      .0087  .0019  .0113      0  .0021      0
Ob   .8270 .1448 .2255      .0078  .0044  .0120 -.0009  .0058  .0005
Oc   .0327 .3092 .2568      .0071  .0025  .0098 -.0005  .0030 -.0006
Od   .1814 .1256 .4049      .0080  .0028  .0063  .0002  .0013  .0002