Willhendersonite Fischer R X, Kahlenberg V, Lengauer C L, Tillmanns E American Mineralogist 93 (2008) 1317-1325 Thermal behavior and structural transformation in the chabazite-type zeolite willhendersonite, KCaAl3Si3O12*5H2O Locality: Mayen, Eifel district, Germany Note: T = 423K _database_code_amcsd 0004629 9.411 9.411 9.411 91.48 91.48 91.48 R-3 atom x y z occ Uiso K1 .5470 .543 .017 .307 .087 Ca1 0 0 0 .273 .0214 Ca2 .543 .625 .011 .172 .16 Ca3 .649 .539 -.051 .052 .04 Al12 .3294 .0830 .8596 .0232 Si11 .1002 .3249 .8621 .0222 O1 .2982 .7098 .0155 .0335 O2 .1099 .8731 .5090 .0376 O3 .2513 .2479 .8657 .0343 O4 -.0155 .0003 .2545 .0271