Ammonioleucite Yamada M, Miyawaki R, Nakai I, Izumi F, Nagashima K Mineralogical Journal 20 (1998) 105-112 A Rietveld analysis of the crystal structure of ammonioleucite _database_code_amcsd 0014433 13.2106 13.2106 13.7210 90 90 90 *I4_1/a 0 .25 .125 atom x y z occ Biso NH4 .358 .368 .112 .53 6.5 K .358 .368 .112 .34 6.5 Al1 .0632 .395 .1672 .2966 .960 Si1 .0632 .395 .1672 .7033 .960 Al2 .1668 .6115 .125 .2966 .89 Si2 .1668 .6115 .125 .7033 .89 Al3 .390 .6418 .0872 .2966 .97 Si3 .390 .6418 .0872 .7033 .97 O1 .124 .304 .111 2.37 O2 .106 .507 .126 2.32 O3 .130 .663 .2246 1.82 O4 .125 .670 .0310 1.88 O5 .2921 .583 .124 1.99 O6 .482 .627 .162 1.87