Pezzottaite
Yakubivich O V, Pekov I V, Steele I M, Massa W, Chukanov N V
Crystallography Reports 54 (2009) 399-412
Alkali metals in beryl and their role in the formation of derivative structural motifs:
Comparative crystal chemistry of vorobyevite and pezzottaite
Locality: Sakavalana granitic pegmatite, Antsirabe, Fianarantsoa Province, Madagascar
Note: T = 100 K
_database_code_amcsd 0012413
15.955 15.955 27.810 90 90 120 R-3c
atom        x       y       z  occ  Uiso
Cs1         0       0  .08211 .725 .0109
Cs2         0       0     .25 .799 .0147
Na1         0       0       0 .275  .016
Na2         0       0   .1642 .201  .054
Al1       2/3  .00060    1/12      .0051
Al2   -.00537     1/3    1/12      .0048
Be      .3379   .1704  .08405      .0092
Li      .5029   .5029     .75
Si1    .04514  .21958 -.00087      .0047
Si2    .21996  .05024  .16537      .0043
Si3    .04988 -.17024  .16640      .0043
O1      .2763   .0641  .21529      .0093
O2      .0700   .2807 -.05057      .0094
O3      .0606  -.2284  .12294      .0132
O4      .2888   .0738  .11915      .0088
O5      .0522   .2824  .04492      .0127
O6      .0680  -.2048  .21771      .0097
O7     -.0587   .1201 -.00490      .0104
O8     -.0534  -.1736  .16590      .0093
O9      .1265  -.0561  .16022      .0112
Wat10   -.038   -.038     .25 .071   .10
Wat11    .026    .003    .084 .107  .099