Pressure dependence of the Raman frequencies for the translational mode in ammonia solid II

Date

2006-12-01

Author

Yurtseven, Hasan Hamit

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We study here the translational mode of the ammonia solid II near the melting point by calculating its Raman frequencies as a function of pressure for the fixed temperatures of 230.4, 263.4 and 297.5 K. We perform this calculation of the Raman frequencies using the volume data by means of our Gruneisen relation. The Raman frequency shifts as the volume changes with the pressure, exhibit an anomalous behaviour near the melting point in the ammonia solid II.

Subject Keywords

Spectroscopy, Atomic and Molecular Physics, and Optics, Radiation

URI

https://hdl.handle.net/11511/47996

Journal

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER

DOI

https://doi.org/10.1016/j.jqsrt.2006.02.052

Collections

Department of Physics, Article

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Pressure dependence of the Raman frequencies of ammonia solid I near the melting point Yurtseven, Hasan Hamit (Institute of Physics, Polish Academy of Sciences, 2001-05-01) We calculated in this study the Raman frequencies of some lattice modes in the melting region of ammonia solid I. The Raman frequencies of those phonon modes were obtained through the Gruneisen relation using the volume data for the ammonia solid I from the literature. Our calculated Raman frequencies require for comparison the experimental Raman frequencies measured as a function of pressure for some fixed temperatures in the ammonia solid I.
Calculation of the Raman frequencies of the translational mode in ammonia solid II Yurtseven, Hasan Hamit (Elsevier BV, 2003-03-01) We report here our calculated Raman frequencies of the translational mode as a function of temperature for the. fixed pressures of 3.65, 5.02 and 6.57 kbars in the ammonia solid II. They were calculated by means of our Gruneisen relation using the volume data from the literature for all the pressures indicated within the temperature regions close to the melting point in this system. Our calculated frequencies are in very-good agreement with those observed experimentally for this translational mode of the am...
Temperature and pressure dependence of the mode Gruneisen parameters close to the melting point in hexagonal ice Karacali, H.; Yurtseven, Hasan Hamit (Elsevier BV, 2007-02-01) We reexamine the Pippard relations in this study by relating the specific heat C-P to the Raman frequency shifts 1/v(partial derivative v/partial derivative T)(P) and the thermal expansivity alpha(p) to the 1/v(partial derivative v/partial derivative P)(T), when the mode Gruneisen parameter depends on the temperature and pressure close to the melting point in hexagonal ice. From linear relations between them, the values of the slope dP/dT are deduced in this crystal.
Temperature and pressure dependence of molar volume in solid phases of ammonia near the melting point Yurtseven, Hasan Hamit (Elsevier BV, 2008-08-20) Temperature and pressure dependencies of the molar volume are studied here along the transition curve between solid I and solid II phases near the melting point in ammonia. The molar volumes are calculated in the temperature range of 217 to 224 K and in the pressure range of 3 to 8 kbar with respect to the triple point (T-t=217.34 K. P-t=3.070 kbar) where the melting curves of solid I and solid II coincide with the transition curve in ammonia.

Citation Formats

H. H. Yurtseven, “Pressure dependence of the Raman frequencies for the translational mode in ammonia solid II,” JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, pp. 409–417, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47996.