Albite
Prewitt C T, Sueno S, Papike J J
American Mineralogist 61 (1976) 1213-1225
The crystal structures of high albite and monalbite at high temperatures
T = 24 deg C
feldspar
8.153 12.8694 7.1070 93.521 116.458 90.257 C-1
atom     x     y     z occ Biso
Na   .2737 .0073 .1329     7.62
Si1o .0090 .1650 .2148 .75  .78
Al1o .0090 .1650 .2148 .25  .78
Si1m .0048 .8145 .2290 .75  .78
Al1m .0048 .8145 .2290 .25  .78
Si2o .6902 .1079 .3202 .75  .82
Al2o .6902 .1079 .3202 .25  .82
Si2m .6849 .8776 .3535 .75  .79
Al2m .6849 .8776 .3535 .25  .79
Oa1  .0055 .1351 .9845     1.62
Oa2  .5916 .9907 .2783     1.32
Obo  .8212 .1084 .1990     1.65
Obm  .8184 .8470 .2455     1.89
Oco  .0162 .2902 .2770     1.45
Ocm  .0213 .6873 .2180     1.49
Odo  .1959 .1123 .3876     1.44
Odm  .1885 .8675 .4266     1.62