Mg5 Na O30 Rb Si12 Nguyen N, Choisnet J, Raveau B Journal of Solid State Chemistry 34 (1980) 1-9 Silicates synthetiques a structure milarite _cod_database_code 1001140 _database_code_amcsd 0013399 10.135 10.135 14.376 90 90 120 P6/mcc atom x y z occ Rb1 0 0 .25 Na1 1/3 2/3 0 .5 Mg1 1/3 2/3 .25 Mg2 .5 0 .25 Si1 .761 .116 .107 O1 .73 .139 0 O2 .942 .223 .136 O3 .658 .155 .163