Phlogopite Steinfink H American Mineralogist 47 (1962) 886-889 Crystal structure of a trioctahedral mica: Phlogopite _database_code_amcsd 0000114 5.36 9.29 10.41 90 100.0 90 C2/m atom x y z occ Biso K 0 0 0 .90 2.22 Mn 0 0 0 .10 2.22 Mg1 0 .5 .5 1.39 Mg2 0 .8333 .5 1.39 Si .5766 .1679 .2261 .75 2.42 Fe .5766 .1679 .2261 .25 2.73 O1 .8338 .2229 .1692 2.79 O2 .6273 .1682 .3900 2.79 O3 .4963 0 .1700 2.79 OH4 .1354 0 .3955 2.79