Euclase Hazen R M, Au A Y, Finger L W American Mineralogist 71 (1986) 977-984 High-pressure crystal chemistry of beryl (Be3Al2Si6O18) and euclase (BeAlSiO4OH) Sample: Pressure = 21 kbar _database_code_amcsd 0001037 4.759 14.255 4.612 90 100.24 90 P2_1/a atom x y z Biso Si .1784 .1002 .5359 .58 Al .2477 .4441 .9576 .70 Be .1707 .2985 .4573 1.0 O1 .3831 .0324 .7592 .69 O2 .3790 .3772 .6489 .67 O3 .3445 .1966 .5291 .65 O4 .1010 .0542 .2096 .67 O5 .1586 .3297 .1156 .81