Microcline Allan D R, Angel R J European Journal of Mineralogy 9 (1997) 263-275 A high-pressure structural study of microcline (KAlSi3O8) to 7 GPa P = 4.4 GPa _database_code_amcsd 0006652 8.276 12.878 7.0936 90.38 116.372 87.89 C-1 atom x y z occ Biso KM .2698 -.0058 .1387 .986 1.91 NaM .2698 -.0058 .1387 .014 1.91 AlT1o -.0014 .1884 .2166 .944 1.31 SiT1o -.0014 .1884 .2166 .056 1.31 AlT1m -.0011 .8207 .2297 .068 1.44 SiT1m -.0011 .8207 .2297 .932 1.44 AlT2o .6969 .1208 .3376 .009 1.42 SiT2o .6969 .1208 .3376 .991 1.42 AlT2m .6931 .8865 .3475 .009 1.48 SiT2m .6931 .8865 .3475 .991 1.48 Oa1 .0002 .1454 -.0141 1.99 Oa2 .6164 .0087 .2887 2.03 Obo .8014 .1445 .2038 1.81 Obm .8124 .8590 .2180 2.15 Oco .0182 .3182 .2592 2.20 Ocm .0227 .6919 .2768 1.91 Odo .1807 .1242 .4063 1.86 Odm .1695 .8760 .4119 2.04