Hurlbutite
Lindbloom J T, Gibbs G V, Ribbe P H
American Mineralogist 59 (1974) 1267-1271
The crystal structure of hurlbutite: A comparison with danburite and anorthite
_database_code_amcsd 0000431
8.299 8.782 7.798 90 90.5 90 P2_1/a
atom     x     y      z Biso
Ca   .3869 .0863  .2440  .66
P1m  .2626 .4177  .4395  .72
Be1o .2680 .4215  .0707  .75
P2o  .0588 .1976 -.0606  .38
Be2m .0566 .1949  .5698  .72
O1o  .1928 .0888  .0028  .60
O1m  .1881 .0737  .4965  .59
O2o  .1224 .3634 -.0550  .54
O2m  .1296 .3689  .5630  .78
O3o  .4215 .3096  .0675  .72
O3m  .4034 .3065  .4371  .61
O4   .4999 .6553  .2388  .73
O5   .1854 .4199  .2591  .77