Nchwaningite
Nyfeler D, Armbruster T, Dixon R, Bermanec V
American Mineralogist 80 (1995) 377-386
Nchwaningite, Mn2SiO3(OH)2.H2O, a new pyroxene-related chain silicate from the
N'chwaning mine, Kalahari manganese field, South Africa
Locality: N'chwaning mine, South Africa
_database_code_amcsd 0001731
12.672 7.217 5.341 90 90 90 Pca2_1
atom      x      y      z  occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Mn1  .18811 .82325      0 .925       .0111  .0113   .077  .0002  .0003  .0010
Mg1  .18811 .82325      0 .053       .0111  .0113   .077  .0002  .0003  .0010
Al1  .18811 .82325      0 .006       .0111  .0113   .077  .0002  .0003  .0010
Fe1  .18811 .82325      0 .004       .0111  .0113   .077  .0002  .0003  .0010
Ca1  .18811 .82325      0 .004       .0111  .0113   .077  .0002  .0003  .0010
Mn2  .95789 .16870 -.0220 .925       .0108  .0118  .0084  .0014 -.0005 -.0001
Mg2  .95789 .16870 -.0220 .053       .0108  .0118  .0084  .0014 -.0005 -.0001
Al2  .95789 .16870 -.0220 .006       .0108  .0118  .0084  .0014 -.0005 -.0001
Fe2  .95789 .16870 -.0220 .004       .0108  .0118  .0084  .0014 -.0005 -.0001
Ca2  .95789 .16870 -.0220 .004       .0108  .0118  .0084  .0014 -.0005 -.0001
Si   .81410 -.2139  .1877            .0089  .0078  .0078  .0003  .0001 -.0002
O1    .8171  .0097  .1733            .0131  .0079  .0090  .0005 -.0004 -.0004
Oh2   .9258 -.0159 -.3282            .0117  .0119  .0123  .0003 -.0006  .0011
Oh3   .6787  .3178  .3443            .0159   .008  .0127 -.0019  .0006 -.0005
Oh4   .9459  .3418  .3336            .0171  .0130   .013  .0006 -.0036 -.0008
O5    .9273 -.3084  .2310            .0104  .0116  .0132  .0013 -.0009  .0003
O6    .7677 -.2847 -.0889            .0153  .0106  .0080  .0013 -.0021 -.0016
H2     .881  -.109    .75       .02
H3     .681   .452   .355       .02
H4     .936   .472   .296       .02
H41    .996   .338    .47       .02