Pollucite Newnham R E American Mineralogist 52 (1967) 1515-1518 Crystal structure and optical properties of pollucite _database_code_amcsd 0000159 13.682 13.682 13.682 90 90 90 Ia-3d atom x y z occ Biso Cs .125 .125 .125 .7 1.7 Na .125 .125 .125 .3 1.7 Al .125 .6631 .5869 .33 0.3 Si .125 .6631 .5869 .67 0.3 O .1036 .1333 .7216 1.8