AM_Laumontite_5 Formula: Si4 Al2 O16.96 Ca H7.92 Name: Laumontite Unit cell: 14.7612 13.0891 7.548 90.0 111.804 90.0 , V=1354.02 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 = 367 K