Milarite
Armbruster T, Bermanec V, Wenger M, Oberhansli R
European Journal of Mineralogy 1 (1989) 353-362
Crystal chemistry of double-ring silicates:
Structure of natural and dehydrated milarite at 100 K
Note: heated sample
_database_code_amcsd 0006357
10.363 10.363 13.827 90 90 120 P6/mcc
atom      x      y      z  occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
KC        0      0    1/4       .98  .0123  .0123  .0125  .0062      0      0
CaA     1/3    2/3    1/4      1.03  .0130  .0130  .0132  .0065      0      0
BeT2    1/2    1/2    1/4 .787  .23   .002   .002   .003   .000      0      0
AlT2    1/2    1/2    1/4 .213  .23   .002   .002   .003   .000      0      0
SiT1 .08214 .33739 .11237      .487  .0061  .0065  .0055  .0029 -.0004 -.0002
O1    .0954  .3854      0       .95   .018   .012  .0052  .0071      0      0
O2    .1962  .2771  .1345       .90  .0115  .0154  .0111  .0096 -.0016 -.0018
O3    .1159  .4742 .18059       .65  .0106  .0081  .0062  .0049 -.0015 -.0017
KB      1/3    2/3      0  .10  2.7   .024   .024    .05   .012      0      0
KD        0      0      0  .17  1.0