Rb2MgSi5O12 Torres-Martinez L M, West A R Zeitschrift fur Kristallographie 175 (1986) 1-7 New family of silicate phases with the pollucite structure _database_code_amcsd 0010959 13.530 13.530 13.530 90 90 90 Ia-3d atom x y z occ Biso Rb .125 .125 .125 6.0 Mg .125 .665 .585 .1667 2.3 Si .125 .665 .585 .8333 2.3 O .100 .127 .717 4.0