Phenakite
Hazen R M, Finger L W
Physics and Chemistry of Minerals 14 (1987) 426-434
High-temperature crystal chemistry of phenakite (Be2SiO4) and
Chrysoberyl (BeAl2O4)
Sample: T = 25 C
_database_code_amcsd 0007439
12.4376 12.4376 8.2312 90 90 120 R-3
atom      x      y      z Biso
Be1  .19403 .21011 .41557  .43
Be2  .19456 .21201 .08466  .52
Si   .19553 .21167 .74982  .23
O1   .20943 .08840 .75061  .42
O2   .33352 .33293 .74989  .36
O3   .12217 .20972 .91520  .37
O4   .12242 .20928 .58542  .40