Tetra-ferri-annite Comodi P, Zanazzi P F, Weiss Z, Rieder M, Drabek M American Mineralogist 84 (1999) 325-332 "Cs-tetra-ferri-annite:" High-pressure and high-temperature behavior of a potential nuclear waste disposal phase T = 23 deg C, crystal 2 _database_code_amcsd 0002204 5.480 9.498 10.820 90 99.76 90 C2/m atom x y z occ Uiso Cs 0 .5 0 .89 .0209 Fe1 0 0 .5 .0088 Fe2 0 .33192 .5 .0090 Si .0796 .16662 .23820 .76 .0099 Fe .0796 .16662 .23820 .23 .0099 Al .0796 .16662 .23820 .01 .0099 O1 .0610 0 .1838 .0272 O2 .3119 .2501 .1844 .0287 O3 .1326 .1662 .3962 .0118 O4 .1325 .5 .4015 .0115