AM_Laumontite_7 Formula: Si4 Al2 O14.53 Ca H4.24 Name: Laumontite Unit cell: 14.5601 13.1629 7.4291 90.0 110.582 90.0 , V=1332.93 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 = 500 K