Anorthoclase
Harlow G E
American Mineralogist 67 (1982) 975-996
The anorthoclase structures: The effects of temperature and composition
Grande Calderira, Or = 32.5, T = 23 deg C
feldspar
Locality: Grande Calderira, Azores
_database_code_amcsd 0000874
8.290 12.966 7.151 91.18 116.31 90.14 C-1
atom     x     y     z  occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Al1  .0085 .1753 .2207  .25 0.0056 0.0017 0.0051 -.0004 0.0028 0.0000
Si1  .0085 .1753 .2207  .75 0.0056 0.0017 0.0051 -.0004 0.0028 0.0000
Al2  .0069 .8180 .2252  .25 0.0053 0.0015 0.0051 0.0007 0.0026 0.0002
Si2  .0069 .8180 .2252  .75 0.0053 0.0015 0.0051 0.0007 0.0026 0.0002
Al3  .6954 .1140 .3354  .25 0.0051 0.0011 0.0065 0.0000 0.0026 0.0002
Si3  .6954 .1140 .3354  .75 0.0051 0.0011 0.0065 0.0000 0.0026 0.0002
Al4  .6941 .8815 .3465  .25 0.0054 0.0011 0.0063 0.0003 0.0027 0.0001
Si4  .6941 .8815 .3465  .75 0.0054 0.0011 0.0063 0.0003 0.0027 0.0001
Na   .2750 .0013 .1366 .667 -.0014 0.0065 0.0139 0.0002 -.0007 -.0052
K    .2750 .0013 .1366 .333 -.0014 0.0065 0.0139 0.0002 -.0007 -.0052
O1   .0016 .1388 .9947      0.0124 0.0030 0.0097 0.0006 0.0061 0.0004
O2   .6056 .9972 .2828      0.0086 0.0018 0.0124 0.0001 0.0032 0.0002
O3   .8233 .1279 .2180      0.0095 0.0041 0.0158 -.0010 0.0075 0.0005
O4   .8227 .8574 .2329      0.0094 0.0039 0.0151 0.0011 0.0071 -.0002
O5   .0233 .3012 .2618      0.0088 0.0022 0.0122 -.0003 0.0044 -.0003
O6   .0241 .6916 .2421      0.0084 0.0020 0.0118 0.0003 0.0030 0.0004
O7   .1897 .1204 .4004      0.0090 0.0025 0.0087 0.0006 0.0023 0.0008
O8   .1883 .8725 .4125      0.0086 0.0027 0.0095 -.0003 0.0022 -.0007