X-ray diffraction measurements on potassium nitrate under high pressure using synchrotron radiation
- 30 January 1988
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 21 (3) , 505-515
- https://doi.org/10.1088/0022-3719/21/3/007
Abstract
Potassium nitrate (KNO3) has seven polymorphs in the pressure range 0-4.0 GPa. The authors have studied it at room temperature as a function of pressure up to 9.3 GPa and have confirmed the structure of phase IV previously refined by neutron diffraction at 0.36 GPa. The compressibility measured in the range 0.3-9.3 GPa is found to be anisotropic with the axial compression ratios a:b:c=1.0:0.64:0.50. The relative merits of X-rays and neutrons for high-pressure studies are discussed.Keywords
This publication has 21 references indexed in Scilit:
- Microcollimated energy-dispersive x-ray diffraction apparatus for studies at megabar pressures with a synchrotron sourceReview of Scientific Instruments, 1986
- Powder Diffraction at very High PressuresMaterials Science Forum, 1986
- Relative vibrational spectral intensities of the internal modes of phase II potassium nitrateThe Journal of Chemical Physics, 1983
- Vibrational spectroscopy at high pressures. Part 30.—Raman study of silver, ammonium and potassium nitratesJournal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics, 1981
- Linear compressibilities of NaNO2 and NaNO3Journal of Applied Physics, 1979
- Pressure induced phase transition in antiferroelectric KNO3Ferroelectrics, 1977
- Raman Spectrum of Calcium Carbonate at High PressuresThe Journal of Chemical Physics, 1971
- Nature of Ferroelectricity in KNPhysical Review B, 1967
- Reexamination of KNO3IV and transition rate of KNO3II ⇋ KNO3IV*Zeitschrift für Kristallographie, 1962
- Polymorphic Changes under Pressure of the Univalent NitratesProceedings of the American Academy of Arts and Sciences, 1916