AM_Laumontite_4 Formula: Si4 Al2 O17.77 Ca H9.4 Name: Laumontite Unit cell: 14.8066 13.1678 7.5389 90.0 110.647 90.0 , V=1375.45 Space group: C12/M1 (12)

Stahl K , Artioli G , Hanson J C , Physics and Chemistry of Minerals , 23 (1996) p.328-336, The dehydration process in the zeolite laumontite:, a real-time synchrotron X-ray powder diffraction study, Sample: T = 310 K