Beryl
Bragg W
Proceedings of the Royal Society of London A111 (1926) 691-714
The structure of beryl, Be3Al2Si6O18
_cod_database_code 1010541
_database_code_amcsd 0017446
9.21 9.21 9.17 90 90 120 P6/mcc
atom   x   y   z
Al   2/3 1/3   0
Be    .5   0   0
Si   .39 .12 .25
O1   .48 .15  .1
O2    .3 .24 .25