Chrysoberyl 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 0007443 4.424 9.396 5.471 90 90 90 Pbnm atom x y z Biso Al1 0 0 0 .32 Al2 .9949 .27306 .25 .20 Be .4333 .0929 .25 .44 O1 .7874 .0901 .25 .35 O2 .2422 .4330 .25 .36 O3 .2568 .1631 .0154 .38