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 = 6.2 GPa _database_code_amcsd 0006653 8.1578 12.8558 7.0406 90.49 116.616 87.86 C-1 atom x y z occ Biso KM .2652 -.0056 .1412 .986 2.18 NaM .2652 -.0056 .1412 .014 2.18 AlT1o -.0065 .1907 .2149 .944 1.32 SiT1o -.0065 .1907 .2149 .056 1.32 AlT1m -.0063 .8196 .2295 .068 1.49 SiT1m -.0063 .8196 .2295 .932 1.49 AlT2o .6955 .1177 .3369 .009 1.57 SiT2o .6955 .1177 .3369 .991 1.57 AlT2m .6890 .8853 .3459 .009 1.54 SiT2m .6890 .8853 .3459 .991 1.54 Oa1 .0051 .1470 -.0111 1.76 Oa2 .6072 .0173 .2928 2.20 Obo .7916 .1474 .1924 1.91 Obm .7979 .8639 .2063 1.75 Oco .0111 .3195 .2661 2.12 Ocm .0147 .6992 .2820 2.19 Odo .1731 .1252 .4064 1.83 Odm .1630 .8775 .4134 2.17