AM_Willhendersonite_3 Formula: K Ca Al3 Si3 O17 H11.27 Name: Willhendersonite Unit cell: 9.206 9.216 9.5 92.34 92.7 90.12 , V=804.43 Space group: P-1 (2)

Tillmanns E , Fischer R X , Baur W H , Neues Jahrbuch fur Mineralogie, Monatshefte , 1984 (1984) p.547-558, Chabazite-type framework in the new zeolite willhendersonite, KCaAl3Si3O12*5H2O