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Original version
Jansen, M.: Zum Tieftemperaturverhalten von Na3NO3. In: Zeitschrift für Naturforschung - Section A Journal of Physical Sciences 37 (1982), Nr. 12, S. 1457-1460. DOI: https://doi.org/10.1515/zna-1982-1215
Low temperature Guinier photographs of Na3NO3 ( + 20° → - 140 °C) indicate two phase transitions to M-Na3NO3 and T-Na3NO3 at - 53±3°C and - 122±3°C, respectively. During the phase transitions the main structural features (NO2-[ONa3]: antiperovskite type of structure) remain unchanged. The dynamically disordered NO2- in H-Na3NO3 order to form an antiferroelectric arrangement in T-Na3NO3. Crystal structures for M-Na3NO3 and T-Na3NO3 are proposed.