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: SHEE-1-6 Locality: SHEE-1 pegmatite dike, eastern end of Shatford Lake, southeastern Manitoba, Canada _database_code_amcsd 0005258 9.206 9.206 9.185 90 90 120 P6/mcc atom x y z occ Uiso Si .3875 .1158 0 .0029 Be 1/2 0 1/4 .0057 Al 2/3 1/3 1/4 .98 .0046 Fe 2/3 1/3 1/4 .02 .0046 O1 .3095 .2362 0 .0080 O2 .4987 .1454 .1454 .0053 Na 0 0 0 .03 .0150