Cummingtonite
Ghose S, Yang H
American Mineralogist 74 (1989) 1091-1096
Mn-Mg distribution in a C2/m manganoan cummingtonite: Crystal-chemical
considerations
_database_code_amcsd 0001266
9.6045 18.1244 5.3251 90 102.642 90 C2/m
atom     x     y     z  occ  Uiso B(1,1) B(2,2) B(3,3)  B(1,2) B(1,3)  B(2,3)
Mn1      0 .0868    .5 .150       .00074 .00087 .00095       0 .00035       0
Mg1      0 .0868    .5 .850       .00074 .00087 .00095       0 .00035       0
Mn2      0 .1769     0 .106       .00067 .00053 .00075       0 .00024       0
Mg2      0 .1769     0 .894       .00067 .00053 .00075       0 .00024       0
Mn3      0     0     0 .062       .00053 .00061 .00042       0 .00022       0
Mg3      0     0     0 .938       .00053 .00061 .00042       0 .00022       0
Ca4      0 .2635    .5 .120       .00134 .00137 .00149       0 .00071       0
Mn4      0 .2635    .5 .836       .00134 .00137 .00149       0 .00071       0
Mg4      0 .2635    .5 .044       .00134 .00137 .00149       0 .00071       0
Si1  .2951 .1699 .7839            .00074 .00065 .00091 -.00007 .00021 -.00004
Si2  .2868 .0842 .2776            .00081 .00085 .00089 -.00008 .00024  .00004
O1   .1143 .0860 .2122            .00051 .00086 .00125 -.00002 .00011  .00000
O2   .1214 .1721 .7179            .00086 .00102 .00121 -.00004 .00022  .00018
O3   .1135     0 .7122            .00084 .00078 .00113       0 .00026       0
O4   .3745 .2470 .7759            .00141 .00120 .00109 -.00043 .00026  .00010
O5   .3492 .1298 .0655            .00098 .00160 .00122 -.00017 .00032  .00046
O6   .3494 .1215 .5575            .00095 .00193 .00136  .00021 .00026 -.00047
O7   .3444     0 .2803            .00109 .00060 .00233       0 .00033       0
H     .195     0  .787      .0019