Beryl
Aurisicchio C, Fioravanti G, Grubessi O, Zanazzi P F
American Mineralogist 73 (1988) 826-837
Reappraisal of the crystal chemistry of beryl
Sample: 12
Note: U(1,2) for Na altered to match symmetry constraints.
Locality: Karoi, Miami district, Zimbabwe
_database_code_amcsd 0001179
9.2202 9.2202 9.1960 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  .3875 .1160     0            .0031  .0027  .0035  .0016      0      0
Be      .5     0   .25 .979 .006
Li      .5     0   .25  .01 .006
Si2     .5     0   .25 .008 .006
Al1     .5     0   .25 .003 .006
Al2    2/3   1/3   .25 .954       .0037  .0037  .0049  .0018      0      0
Fe     2/3   1/3   .25 .046       .0037  .0037  .0049  .0018      0      0
O1   .3084 .2353     0            .0103  .0082  .0148  .0072      0      0
O2   .4982 .1453 .1449            .0080  .0067  .0064  .0043 -.0030 -.0010
Na       0     0   .25 .067       .0359  .0359  .0306 .01795      0      0