Beryl Aurisicchio C, Fioravanti G, Grubessi O, Zanazzi P F American Mineralogist 73 (1988) 826-837 Reappraisal of the crystal chemistry of beryl Sample: 1 Locality: Calcaferro mine, Pietrasanta, Tuscany, Italy _database_code_amcsd 0001173 9.2666 9.2666 9.1874 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 .3858 .1130 0 .0036 .0033 .0045 .0019 0 0 Be .5 0 .25 .972 .006 Li .5 0 .25 .009 .006 Si2 .5 0 .25 .009 .006 Al1 .5 0 .25 .016 .006 Al2 2/3 1/3 .25 .763 .0043 .0043 .0073 .0021 0 0 Fe 2/3 1/3 .25 .15 .0043 .0043 .0073 .0021 0 0 Mg 2/3 1/3 .25 .088 .0043 .0043 .0073 .0021 0 0 O1 .3050 .2311 0 .0127 .0102 .0197 .0097 0 0 O2 .4956 .1429 .1452 .0116 .0113 .0073 .0078 -.0026 -.0006 Na 0 0 .25 .425 .0499 .0499 .0319 .0249 0 0