AM_Beryl_16 Formula: Si6 Be2.979 Li.018 Al1.925 Fe.018 Mg.06 O18 Na.091 Name: Beryl Unit cell: 9.2176 9.2176 9.1968 90.0 90.0 120.0 , V=676.71 Space group: P6/MCC (192)

Aurisicchio C , Fioravanti G , Grubessi O , Zanazzi P F , American Mineralogist , 73 (1988) p.826-837, Reappraisal of the crystal chemistry of beryl, Sample: 26