AM_Beryl_31 Formula: Si6 Be2.79 Li.54 Al2 O18 Na.23 Cs.08 Name: Beryl Unit cell: 9.202 9.202 9.207 90.0 90.0 120.0 , V=675.17 Space group: P6/MCC (192)

Sherriff B L , Grundy H D , Hartman J S , Hawthorne F C , Cerny P , The Canadian Mineralogist , 29 (1991) p.271-285, The incorporation of alkalis in beryl: multi-nuclear MAS NMR, and crystal-structure study, Sample: EEE-10, Locality: Bernic Lake, Manitoba, Canada