Howlite
Finney J J, Kumbasar I, Konnert J A, Clark J R
American Mineralogist 55 (1970) 716-728
Crystal structure of the calcium silicoborate, howlite
_database_code_amcsd 0000202
12.78 9.33 8.60 90 104.83 90 P2_1/c
atom     x     y     z Biso
Ca1  .1171 .1838 .1493   .8
Ca2  .4118 .8216 .5228   .7
Si   .1411 .5549 .0115   .7
B1    .039  .471  .257  1.2
B2    .323  .384  .033  1.0
B3    .492  .423  .256  1.4
B4    .343  .261  .284  1.1
B5    .157  .650  .476  1.3
O1    .081  .512 -.174   .9
O2    .127  .723  .047  1.4
O3    .102  .450  .137   .8
O4    .269  .525  .030   .9
O5    .061  .597  .355   .5
O6    .438  .407  .078  1.1
O7    .292  .171  .364   .8
O8    .287  .282  .130  1.0
O9    .438  .333  .352   .8
OH10  .497  .570  .294  1.1
OH11  .601  .356  .272   .9
OH12  .246  .685  .398  1.0
OH13  .197  .542  .599   .8
OH14  .055  .338  .351   .5