Beryl Aurisicchio C, Fioravanti G, Grubessi O, Zanazzi P F American Mineralogist 73 (1988) 826-837 Reappraisal of the crystal chemistry of beryl Sample: 3 Locality: Mount Cervandone, Val d'Ossola, Piedmont, Italy _database_code_amcsd 0001172 9.2736 9.2736 9.1910 90 90 120 P6/mcc atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Si1 .3852 .1122 0 .0062 .0063 .0016 .0034 0 0 Be .5 0 .25 .953 .006 Li .5 0 .25 .009 .006 Si2 .5 0 .25 .037 .006 Al1 .5 0 .25 .001 .006 Al2 2/3 1/3 .25 .654 .0084 .0084 .0049 .0042 0 0 Fe1 2/3 1/3 .25 .037 .0084 .0084 .0049 .0042 0 0 Fe2 2/3 1/3 .25 .146 .0084 .0084 .0049 .0042 0 0 Mg 2/3 1/3 .25 .164 .0084 .0084 .0049 .0042 0 0 O1 .3062 .2315 0 .0147 .0141 .0147 .0114 0 0 O2 .4951 .1418 .1450 .0130 .0135 .0045 .0085 -.0024 -.0001 Na 0 0 .25 .406 .0580 .0580 .0323 .0290 0 0 Cs 0 0 .25 .012 .0580 .0580 .0323 .0290 0 0