AM_Beryl_33
Formula: Si6 Be2.55 Li.46 Al2 O18 Na.28 Cs.15
Name: Beryl
Unit cell: 9.228 9.228 9.24 90.0 90.0 120.0 , V=681.42
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: T-24, Locality: Bernic Lake, Manitoba, Canada