AM_Natrolite_19 Formula: Na2 Al2 Si3 O10 Name: Natrolite Unit cell: 17.328 17.551 6.385 90.0 90.0 90.0 , V=1941.83 Space group: FDD2 (43)

Baur W H , Joswig W , Neues Jahrbuch fur Mineralogie, Monatshefte , 1996 (1996) p.171-187, The phases of natrolite occurring during dehydration and rehydration studied, by single crystal X-ray diffraction methods between room temperature and 923 K, Locality: Khibiny, Kola peninsula, Russia, Sample: T = 573 K, crystal III, high natrolite