Guidottiite
Wahle M W, Bujnowski T J, Guggenheim S, Kogure T
Clays and Clay Minerals 58 (2010) 364-376
Guidottiite, the Mn-analogue of cronstedtite: A new serpentine-group
mineral from South Africa
Locality: N'chwaning 2 mine, Kalahari manganese field, South Africa
_database_code_amcsd 0018323
5.5472 5.5472 14.296 90 90 120 P6_3
atom       x      y     z  occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
MnM1   .6670 -.0008 .2375 .618 .0139  .0138  .0138  .0141  .0070  .0001  .0003
Fe3+M1 .6670 -.0008 .2375 .203 .0139  .0138  .0138  .0141  .0070  .0001  .0003
MgM1   .6670 -.0008 .2375 .179 .0139  .0138  .0138  .0141  .0070  .0001  .0003
SiT1       0      0 .0382 .322 .0090  .0086  .0086  .0097  .0043      0      0
Fe3+T1     0      0 .0382 .678 .0090  .0086  .0086  .0097  .0043      0      0
SiT2     1/3    2/3 .0366 .631 .0095  .0088  .0088   .011  .0044      0      0
Fe3+T2   1/3    2/3 .0366 .369 .0095  .0088  .0088   .011  .0044      0      0
O1      .191   .332     0      .0190
O4         0      0 .1570      .0067  .0096  .0096   .001  .0048      0      0
O5       1/3    2/3 .1577      .0073  .0074  .0074   .007  .0037      0      0
OH1      2/3    1/3 .1592      .0052  .0068  .0068   .002  .0034      0      0
OH2     .335   .001 .3081      .0087   .010   .013   .002   .005   .002   .001