Biotite Hendricks S B, Jefferson M E American Mineralogist 24 (1939) 729-771 Polymorphism of the micas with optical measurements _database_code_amcsd 0000028 5.3 5.3 60.0 90 90 120 P-1 atom x y z occ K1 0 .1667 .0825 K2 .3333 .1667 .2492 K3 .3333 .5 .4158 Mg1 .3333 .1667 0 Mg2 0 .5 0 Mg3 .3333 .1667 .5 Mg4 0 .5 .5 Mg5 0 .8333 .1667 Mg6 .6667 .1667 .1667 Mg7 .3333 .5 .1837 Mg8 0 .1667 .5 Mg9 .3333 .8333 .3333 Mg10 .6667 .5 .3503 Si1 .3333 .8333 .0440 .75 Si2 .6667 .5 .0440 .75 Si3 0 .1667 .5440 .75 Si4 .3333 .8333 .5440 .75 Si5 .6667 .8333 .2107 .75 Si6 0 .5 .2107 .75 Si7 .6667 .5 .1227 .75 Si8 .3333 .8333 .1227 .75 Si9 0 .8333 .3773 .75 Si10 .6667 .1667 .3773 .75 Si11 0 .5 .2893 .75 Si12 .6667 .8333 .2893 .75 Al1 .3333 .8333 .0440 .25 Al2 .6667 .5 .0440 .25 Al3 0 .1667 .5440 .25 Al4 .3333 .8333 .5440 .25 Al5 .6667 .8333 .2107 .25 Al6 0 .5 .2107 .25 Al7 .6667 .5 .1227 .25 Al8 .3333 .8333 .1227 .25 Al9 0 .8333 .3773 .25 Al10 .6667 .1667 .3773 .25 Al11 0 .5 .2893 .25 Al12 .6667 .8333 .2893 .25 O1 .3333 .8333 .0170 O2 .6667 .5 .0170 O3 0 .6667 .0530 O4 .5 .6667 .0530 O5 .5 .1667 .0530 O6 0 .1667 .5170 O7 .3333 .8333 .5170 O8 .1667 0 .5530 O9 .6667 0 .5530 O10 .1667 .5 .5530 O11 .6667 .8333 .1837 O12 0 .5 .1837 O13 .6667 .5 .1497 O14 .3333 .8333 .1497 O15 .8333 .6667 .2197 O16 .8333 .1667 .2197 O17 .3333 .6667 .2197 O18 0 .6667 .1137 O19 .5 .6667 .1137 O20 .5 .1667 .1137 O21 0 .8333 .3503 O22 .6667 .1667 .3503 O23 0 .5 .3163 O24 .6667 .8333 .3163 O25 .8333 0 .3863 O26 .3333 0 .3863 O27 .8333 .5 .3863 O28 .8333 .1667 .2803 O29 .8333 .6667 .2803 O30 .3333 .6667 .2803 OH1 0 .1667 .0170 .50 OH2 .6667 .5 .5170 .50 OH3 .3333 .1667 .1837 .50 OH4 0 .1667 .1497 .50 OH5 .3333 .5 .3503 .50 OH6 .3333 .1667 .3163 .50 F1 0 .1667 .0170 .50 F2 .6667 .5 .5170 .50 F3 .3333 .1667 .1837 .50 F4 0 .1667 .1497 .50 F5 .3333 .5 .3503 .50 F6 .3333 .1667 .3163 .50