Trembathite
Schindler M, Hawthorne F C
The Canadian Mineralogist 36 (1998) 1195-1201
The crystal structure of trembathite, (Mg1.55Fe1.43Mn0.02)B7O13Cl, a mineral of
the boracite group: An example of the insertion of a cluster into a three-dimensional net
_database_code_amcsd 0005564
8.588 8.588 21.050 90 90 120 R3c
atom      x      y      z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Mg    .7015  .8501      0 .52        .010   .005   .008   .006  -.005  -.002
Fe    .7015  .8501      0 .48        .010   .005   .008   .006  -.005  -.002
B1     .101  -.102  .1448     .008
B2    -.169   .169  .0884            .012   .006   .012   .005  -.002  -.003
B3      2/3    1/3  .1069            .010   .010   .002   .005      0      0
O1        0      0  .1620            .008   .008   .008   .004      0      0
O2    .7463  .6412  .0274            .007   .006   .006   .003  -.003  -.003
O3    .6383  .0433 -.0306            .009   .006   .005   .003  -.002  -.001
O4    .7766  .9761  .0848            .009   .001   .007   .002  -.002  -.002
O5    .4934  .6660 -.0562            .013   .005   .009   .007   .001   .001
Cl        0      0 -.0626            .013   .013   .012   .006      0      0