AM_Willhendersonite_2 Formula: K1.842 Ca1.617 Al6 Si6 O24 Name: Willhendersonite Unit cell: 9.411 9.411 9.411 91.48 91.48 91.48 , V=832.65 Space group: R-3 (148)

Fischer R X , Kahlenberg V , Lengauer C L , Tillmanns E , American Mineralogist , 93 (2008) p.1317-1325, Thermal behavior and structural transformation in the chabazite-type zeolite, willhendersonite, KCaAl3Si3O12*5H2O, Locality: Mayen, Eifel district, Germany, Note: T = 423K