AM_Beryl_30 Formula: Si6 Be3 (Al1.96 Fe.04) O18 Na.03 Name: Beryl Unit cell: 9.206 9.206 9.185 90.0 90.0 120.0 , V=674.14 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: SHEE-1-6, Locality: SHEE-1 pegmatite dike, eastern end of Shatford Lake, southeastern Manitoba, Canada