Phenakite
Hazen R M, Au A Y
Physics and Chemistry of Minerals 13 (1986) 69-78
High-pressure crystal chemistry of phenakite (Be2SiO4)
and bertrandite (Be4Si2O7(OH)2)
Sample: P = 36 kbar
_database_code_amcsd 0007373
12.397 12.397 8.207 90 90 120 R-3
atom     x     y     z Biso
Be1  .1944 .2113 .4170  .93
Be2  .1929 .2129 .0840 1.25
Si   .1950 .2118 .7497  .52
O1   .2096 .0885 .7509  .67
O2   .3339 .3341 .7501  .68
O3   .1227 .2101 .9150  .71
O4   .1218 .2086 .5851  .85