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 P2A Locality: Adamello Massif, Northern Italy _database_code_amcsd 0020551 8.583 12.988 7.202 90 116.05 90 C-1 atom x y z occ K1 .2851 .9996 .1380 .931 Na1 .2851 .9996 .1380 .055 Ca1 .2851 .9996 .1380 .009 Ba1 .2851 .9996 .1380 .005 Al1 .0095 .1852 .2236 .415 Si1 .0095 .1852 .2236 .585 Al2 .0096 .8152 .2247 .335 Si2 .0096 .8152 .2247 .665 Al3 .7096 .1181 .3442 .11 Si3 .7096 .1181 .3442 .89 Al4 .7093 .8823 .3447 .11 Si4 .7093 .8823 .3447 .89 O1 .9996 .1458 .9983 O2 .6382 .0003 .2854 O3 .8267 .1469 .2270 O4 .8276 .8533 .2276 O5 .0357 .3119 .2579 O6 .0354 .6888 .2597 O7 .1810 .1260 .4062 O8 .1801 .8738 .4066