Beryl
Brown G E, Mills B A
American Mineralogist 71 (1986) 547-556
High-temperature structure and crystal chemistry of hydrous alkali-rich beryl
from the Harding pegmatite, Taos County, New Mexico
Sample: T = 24 deg C, after heating
_database_code_amcsd 0001014
9.233 9.233 9.243 90 90 120 P6/mcc
atom      x     y     z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Be2      .5     0   .25 .86  .0021  .0026  .0018  .0013      0      0
Li2      .5     0   .25 .13  .0021  .0026  .0018  .0013      0      0
Al2      .5     0   .25 .01  .0021  .0026  .0018  .0013      0      0
Al      2/3   1/3   .25      .0017  .0017  .0017 .00085      0      0
Si1   .3891 .1186     0 .98  .0013  .0012  .0014  .0006      0      0
Al1   .3891 .1186     0 .02  .0013  .0012  .0014  .0006      0      0
O1    .3055 .2351     0      .0028  .0022  .0051  .0018      0      0
O2    .4982 .1468 .1447      .0038  .0040  .0026  .0024 -.0018 -.0014
WatC1     0     0   .25 .55  .0067  .0067  .0052 .00335      0      0
CsC1      0     0   .25 .09  .0067  .0067  .0052 .00335      0      0
KC1       0     0   .25 .05  .0067  .0067  .0052 .00335      0      0
NaC2      0     0     0 .21  .0059  .0059  .0029 .00295      0      0
CaC2      0     0     0 .02  .0059  .0059  .0029 .00295      0      0
MgC2      0     0     0 .02  .0059  .0059  .0029 .00295      0      0
FeC2      0     0     0 .01  .0059  .0050  .0029 .00295      0      0