AM_Beryl_4 Formula: Be3 Al2 Si6 O18 Name: Beryl Unit cell: 9.208 9.208 9.188 90.0 90.0 120.0 , V=674.66 Space group: P6/MCC (192)

Hazen R M , Au A Y , Finger L W , American Mineralogist , 71 (1986) p.977-984, High-pressure crystal chemistry of beryl (Be3Al2Si6O18) and euclase (BeAlSiO4OH), Sample: Pressure = .001 kbar