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 P1C Locality: Adamello Massif, Northern Italy _database_code_amcsd 0020537 8.574 12.962 7.210 90.35 116.03 88.8 C-1 atom x y z occ K1 .2837 .9960 .1372 .94 Na1 .2837 .9960 .1372 .06 Al1 .0097 .1865 .2205 .68 Si1 .0097 .1865 .2205 .32 Al2 .0094 .8176 .2286 .15 Si2 .0094 .8176 .2286 .85 Al3 .7105 .1192 .3421 .065 Si3 .7105 .1192 .3421 .935 Al4 .7073 .8840 .3480 .055 Si4 .7073 .8840 .3480 .945 O1 .0007 .1451 .9901 O2 .6368 .0039 .2849 O3 .8237 .1480 .2224 O4 .8290 .8562 .2348 O5 .0353 .3163 .2549 O6 .0371 .6930 .2646 O7 .1860 .1248 .4053 O8 .1768 .8740 .4084