Gismondine Fischer K F American Mineralogist 48 (1963) 664-672 The crystal structure determination of the zeolite gismondite. CaAl2Si2O8.4H2O _database_code_amcsd 0000123 10.02 10.62 9.84 90 92.42 90 P2_1/c atom x y z occ Si1 .415 .113 .182 Si2 .908 .870 .160 Al1 .097 .113 .170 Al2 .590 .867 .149 Ca .720 .077 .354 O1 .078 .154 -.001 O2 .262 .075 .212 O3 .438 .145 .026 O4 .246 .407 .303 O5 0 -.017 .215 O6 .044 .242 .261 O7 .463 .224 .276 O8 .511 -.005 .226 Wat1 .257 .107 .505 Wat2 .590 .127 .539 Wat3 .911 .119 .501 Wat4 .77 .21 .17 .5 Wat5 .74 .18 .895 .5