American Mineralogist Crystal Structure Database

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Orthoclase
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Fenn P M, Brown G E
 
Zeitschrift fur Kristallographie 145 (1977) 124-145
Crystal structure of a synthetic, compositionally intermediate,
hypersolvus alkali feldspar: evidence for Na, K site ordering
Locality: Synthetic
_database_code_amcsd 0020553
8.434 13.015 7.1717 90 116.09 90 C-1
atom     x      y      z occ Biso
K1   .2787      0  .1357 .50 1.79
K2   .2880 -.0012  .1416 .08  9.4
Na1  .2880 -.0012  .1416 .42  9.4
Si1  .0086  .1816  .2237 .71 1.28
Al1  .0086  .1816  .2237 .29 1.28
Si2  .0083  .8183  .2235 .72 1.26
Al2  .0083  .8183  .2235 .28 1.26
Si3  .7019  .1170  .3430 .78 1.23
Al3  .7019  .1170  .3430 .22 1.23
Si4  .7020  .8828  .3430 .78 1.22
Al4  .7020  .8828  .3430 .22 1.22
O1       0  .1426 -.0002     2.00
O2   .6184  .0002  .2842     1.97
O3   .8262  .1411  .2268     2.06
O4   .8266  .8588  .2275     1.99
O5   .0291  .3081  .2554     1.78
O6   .0289  .6922  .2559     1.80
O7   .1847  .1261  .4042     1.85
O8   .1845  .8743  .4041     1.86
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