Olmiite
Bonazzi P, Bindi L, Medenbach O, Pagano R, Lampronti G I, Menchetti S
Mineralogical Magazine 71 (2007) 193-201
Olmiite, CaMn[SiO3(OH)](OH), the Mn-dominant analogue of poldervaartite,
a new mineral species from Kalahari manganese fields (Republic of South Africa)
Locality: N'Chwaning II mine, Republic of South Africa
_database_code_amcsd 0014579
9.249 9.076 10.342 90 90 90 Pbca
atom      x      y      z occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Ca   .15329 .49245 .39231     .0092  .0100  .0099  .0077 -.0003  .0005  .0002
MnM2 .50894 .33741 .43030 .84 .0103  .0118  .0104  .0086 -.0023 -.0006 -.0001
CaM2 .50894 .33741 .43030 .14 .0103  .0118  .0104  .0086 -.0023 -.0006 -.0001
FeM2 .50894 .33741 .43030 .01 .0103  .0118  .0104  .0086 -.0023 -.0006 -.0001
Si   .32771 .21852 .65915     .0079  .0096  .0076  .0065 -.0001 -.0001 -.0002
O2    .9441  .3544  .4391     .0107  .0101  .0128  .0094 -.0014 -.0018 -.0017
O3    .1009  .7144  .2881     .0122  .0164  .0117  .0086  .0022  .0037  .0020
O4    .4005  .5509  .4012     .0140  .0141  .0152  .0127 -.0016  .0006  .0012
O5    .1956  .3953  .1874     .0117  .0122  .0129  .0099  .0023  .0009 -.0007
O1    .2509  .3568  .5767     .0151   .025  .0076  .0123  .0027 -.0067 -.0003
H1     .249   .441   .619       .04
H2     .430   .595   .339       .04