Magadiite Garces J M, Rocke S C, Crowder C E, Hasha D L Clays and Clay Minerals 36 (1988) 409-418 Hypothetical structures of magadiite and sodium octosilicate and structural relationships between the layered alkali metal silicates and the mordenite- and pentasil-group zeolites Note: hypothetical model structure Note: setting changed from left- to right-handed _database_code_amcsd 0012231 27.5 7.52 9.20 90 101 90 C2/m atom x y z Si1 .21126 .29551 .84561 Si2 .20801 .28739 .35290 Si3 .12449 0 .73781 Si4 .12371 0 .37788 O1 .16201 .16926 .80020 O2 .15677 .17826 .35159 O3 .25739 .30479 .75460 O4 .11734 0 .55363 O5 .20147 .5 .32162 O6 .19115 .5 .85903 O7 .25 .25 0 O8 .25 .25 .5 O9 .06741 0 .77744 O10 .06851 0 .27024