Orthoclase
Dal Negro A, De Pieri R, Quareni S
Acta Crystallographica B34 (1978) 2699-2707
The crystal structures of nine K feldspars from the Adamello
Massif (Northern Italy)
Note: Sample P2B
Locality: Adamello Massif, Northern Italy
_database_code_amcsd 0020550
8.589 13.013 7.197 90 116.02 90 C-1
atom     x     y     z occ
K1   .2850 .9998 .1378 .94
Na1  .2850 .9998 .1378 .06
Al1  .0097 .1850 .2237 .37
Si1  .0097 .1850 .2237 .63
Al2  .0095 .8151 .2241 .35
Si2  .0095 .8151 .2241 .65
Al3  .7093 .1179 .3442 .15
Si3  .7093 .1179 .3442 .85
Al4  .7092 .8822 .3446 .14
Si4  .7092 .8822 .3446 .86
O1   .9997 .1459 .9998
O2   .6373 .0002 .2852
O3   .8275 .1471 .2270
O4   .8277 .8534 .2275
O5   .0357 .3115 .2582
O6   .0352 .6892 .2590
O7   .1812 .1260 .4054
O8   .1804 .8738 .4057