AM_Beryl_20
Formula: Si6.021 Be2.496 Li.468 Al2.015 O18 Na.261 Cs.15 Rb.001
Name: Beryl
Unit cell: 9.2097 9.2097 9.2337 90.0 90.0 120.0 , V=678.26
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: 20