Beryl Sherriff B L, Grundy H D, Hartman J S, Hawthorne F C, Cerny P The Canadian Mineralogist 29 (1991) 271-285 The incorporation of alkalis in beryl: multi-nuclear MAS NMR and crystal-structure study Sample: EEE-10 Locality: Bernic Lake, Manitoba, Canada _database_code_amcsd 0005259 9.202 9.202 9.207 90 90 120 P6/mcc atom x y z occ Uiso Si .3888 .1181 0 .0051 Be 1/2 0 1/4 .93 .0094 Li 1/2 0 1/4 .07 .0094 Al 2/3 1/3 1/4 .0054 O1 .3064 .2354 0 .0119 O2 .4984 .1468 .1448 .0102 Na 0 0 0 .23 .0129 Li 0 0 0 .33 .0129 Cs 0 0 1/4 .08 .0484