Torrecillasite
Kampf A R, Nash B P, Dini M, Molina Donoso A A
Mineralogical Magazine 78 (2014) 747-755
Torrecillasite, Na(As,Sb)3+4O6Cl, a new mineral from the Torrecillas mine,
Iquique Province, Chile: description and crystal structure
Locality: Torrecillas mine, Iquique Province, Chile
_database_code_amcsd 0020486
5.2580 8.0620 18.654 90 90 90 Pmcn
atom     x      y      z  occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Na     .75  .4002  .5588      .0318   .033   .035   .028      0      0 -.0014
As1    .75 .16859 .87893 .586 .0241  .0188  .0250  .0285      0      0 -.0022
Sb1    .75 .16859 .87893 .414 .0241  .0188  .0250  .0285      0      0 -.0022
As2    .75 .65653 .04509      .0227  .0180  .0216  .0285      0      0 -.0019
As3    .75 .41702 .18118      .0197  .0160  .0211  .0220      0      0  .0004
As4    .75 .78414 .82924 .930 .0212  .0157  .0223  .0257      0      0 -.0030
Sb4    .75 .78414 .82924 .070 .0212  .0157  .0223  .0257      0      0 -.0030
O1     .75  .9400  .8994      .0254   .029   .023   .025      0      0   .002
O2     .25  .3831  .8607      .0253   .030   .020   .026      0      0   .003
O3   .0010  .6680  .8745      .0239   .018   .029   .025   .003   .003   .001
O4   .9978  .1930  .9519      .0301   .027   .036   .027  -.011  -.003   .005
Cl     .75  .4904 .71233      .0350  .0286  .0367  .0397      0      0 -.0118