AM_Natrolite_17 Formula: Si2.965 Al1.986 O12 Na1.982 H4 Name: Natrolite Unit cell: 18.2929 18.6407 6.5871 90.0 90.0 90.0 , V=2246.15 Space group: FDD2 (43)

Stuckenschmidt E , Joswig W , Baur W H , Physics and Chemistry of Minerals , 19 (1993) p.562-570, Natrolite, Part I: refinement of high-order data, separation, of internal and external vibrational amplitudes from, displacement parameters