AM_Laumontite_8 Formula: Si4 Al2 O14.13 Ca H3.68 Name: Laumontite Unit cell: 14.5279 13.1979 7.437 90.0 110.368 90.0 , V=1336.80 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 = 584 K