Citation: Baur, W. H.; Joswig, W. (1996). 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 = 293 K, crystal III, "postnatrolite". Neues Jahrbuch fur Mineralogie, Monatshefte, 1996, pp. 171-187.