AM_Natrolite_5 Formula: Si3 Al2 Na2 O10 Name: Natrolite Unit cell: 17.574 18.161 6.3674 90.0 90.0 90.0 , V=2032.23 Space group: FDD2 (43)

Wang H , Bish D L , American Mineralogist , 93 (2008) p.1191-1194, A PH2O-dependent structural phase transition in the zeolite natrolite, Sample: alpha2-metanatrolite at 400 C, 0.15 mbar