Eudidymite
Fang J H, Robinson P D, Ohya Y
American Mineralogist 57 (1972) 1345-1354
Redetermination of the crystal structure of eudidymite and its dimorphic
relationship to epididymite
_database_code_amcsd 0000293
12.63 7.38 14.02 90 103.72 90 C2/c
atom     x     y     z Biso
Na   .0287 .3405 .9282 2.57
Be   .1677 .3228 .4969 1.08
Si1  .2038 .0199 .6416  .76
Si2  .2518 .1027 .8665  .78
Si3  .0297 .0933 .3618  .82
O1   .0732 .0329 .6266 1.07
O2   .2401 .1800 .1152 1.49
O3   .2410 .1650 .5715 1.19
O4   .2368 .4392 .2447 1.65
O5   .1549 .4984 .0558 1.16
O6   .1292 .0519 .8755 1.12
O7       0 .1732   .25 1.51
O8   .0526 .2561 .4373 1.31
Wat      0 .4322   .75 3.03