Beryl
Aurisicchio C, Fioravanti G, Grubessi O, Zanazzi P F
American Mineralogist 73 (1988) 826-837
Reappraisal of the crystal chemistry of beryl
Sample: 2
Locality: Calcaferro mine, Pietrasanta, Tuscany, Italy
_database_code_amcsd 0001174
9.2676 9.2676 9.1945 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 .1128     0            .0041  .0038  .0036  .0023      0      0
Be      .5     0   .25 .981 .006
Li      .5     0   .25 .006 .006
Si2     .5     0   .25 .012 .006
Al1     .5     0   .25 .001 .006
Al2    2/3   1/3   .25 .745       .0053  .0053  .0057  .0026      0      0
Fe1    2/3   1/3   .25 .006       .0053  .0053  .0057  .0026      0      0
Fe2    2/3   1/3   .25 .081       .0053  .0053  .0057  .0026      0      0
Mg     2/3   1/3   .25  .17       .0053  .0053  .0057  .0026      0      0
O1   .3045 .2305     0            .0122  .0099  .0178  .0089      0      0
O2   .4951 .1424 .1451            .0109  .0106  .0064  .0068 -.0027 -.0006
Na       0     0   .25 .443       .0709  .0709  .0431  .0354      0      0