AM_Beryl_15 Formula: Si6.024 Be2.937 Li.03 Al1.917 Fe.092 O18 Na.067 Name: Beryl Unit cell: 9.2202 9.2202 9.196 90.0 90.0 120.0 , V=677.03 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: 12, Note: U(1,2) for Na altered to match symmetry constraints.