Muscovite Rule A C, Bailey S W Clays and Clay Minerals 33 (1985) 403-409 Refinement of the crystal structure of phengite-2M1 Locality: Rio de Oro, Spanish Sahara _database_code_amcsd 0019604 5.2153 9.043 19.974 90 95.789 90 C2/c atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) K 0 .0971 .25 .948 1.946 .0184 .0058 .00124 0 .00030 0 Na 0 .0971 .25 .051 1.946 .0184 .0058 .00124 0 .00030 0 Ba 0 .0971 .25 .027 1.946 .0184 .0058 .00124 0 .00030 0 AlM2 .2486 .08292 .00003 .742 .814 .0175 .00205 .00061 .0000 .00012 .00007 MgM2 .2486 .08292 .00003 .134 .814 .0175 .00205 .00061 .0000 .00012 .00007 FeM2 .2486 .08292 .00003 .071 .814 .0175 .00205 .00061 .0000 .00012 .00007 CrM2 .2486 .08292 .00003 .047 .814 .0175 .00205 .00061 .0000 .00012 .00007 TiM2 .2486 .08292 .00003 .005 .814 .0175 .00205 .00061 .0000 .00012 .00007 MnM2 .2486 .08292 .00003 .001 .814 .0175 .00205 .00061 .0000 .00012 .00007 SiT1 .4643 .92930 .13565 .813 .524 .0053 .00113 .00040 -.0001 .00016 .00005 AlT1 .4643 .92930 .13565 .187 .524 .0053 .00113 .00040 -.0001 .00016 .00005 SiT2 .4522 .25864 .13565 .813 .518 .0048 .00134 .00038 .0001 .00005 .00003 AlT2 .4522 .25864 .13565 .187 .518 .0048 .00134 .00038 .0001 .00005 .00003 O1 .4582 .9402 .0541 .952 .0104 .0028 .00052 -.0002 .0001 .00013 O2 .3916 .2516 .0541 .965 .0097 .0031 .00053 .0001 .0001 .00015 O3 .4335 .0933 .1689 1.294 .0170 .0026 .00076 .0004 .0005 .0000 O4 .2410 .8206 .1598 1.374 .0124 .0049 .00075 -.0021 .0000 .0003 O5 .2410 .3621 .1691 1.264 .0119 .0041 .00074 .0022 .0002 .0000 O6 .4556 .5643 .0519 1.161 .0125 .0031 .00071 .0008 .0005 -.00030 H .3443 .6435 .048 2.0