Microcline 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 A1D Locality: Adamello Massif, Northern Italy _database_code_amcsd 0020535 8.564 12.984 7.201 90.13 116.02 89.53 C-1 atom x y z occ K1 .28420 .99866 .13764 .904 Na1 .28420 .99866 .13764 .085 Ca1 .28420 .99866 .13764 .005 Ba1 .28420 .99866 .13764 .006 Al1 .00951 .18514 .22282 .485 Si1 .00951 .18514 .22282 .515 Al2 .00938 .81611 .22545 .305 Si2 .00938 .81611 .22545 .695 Al3 .70914 .11820 .34362 .09 Si3 .70914 .11820 .34362 .91 Al4 .70810 .88282 .34530 .07 Si4 .70810 .88282 .34530 .93 O1 .0004 .1454 .9969 O2 .6363 .0010 .2851 O3 .8258 .1463 .2261 O4 .8276 .8546 .2299 O5 .0351 .3126 .2574 O6 .0353 .6901 .2605 O7 .1827 .1255 .4067 O8 .1799 .8741 .4074