Raman Frequencies calculated as a function of pressure for the rotatory lattice mode in ammonia solid II near the melting point

Date

2004-04-01

Author

Yurtseven, Hasan Hamit

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

27
views

0
downloads

This study gives our calculations for the Raman frequencies of the rotatory lattice mode in ammonia solid II near the melting point. The Raman frequencies of this mode are calculated as a function of the pressure using the volume data for the fixed temperatures of 230.4 K, 263.4 K, and 297.5 K by means of our Gruneisen relation. Our calculated frequencies can be examined experimentally when the Raman measurements are performed at various pressures for the constant temperatures considered.

Subject Keywords

Phase-Diagram, Neutron-Diffraction, Volume Dependence, Deuteroammonia, Temperature, Transition, Spectrum

URI

https://hdl.handle.net/11511/55282

Journal

CHINESE JOURNAL OF PHYSICS

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Raman frequency shifts for ammonia solid I near the melting point Yurtseven, Hasan Hamit (1999-07-01) We have performed in this study the calculation of the Raman frequencies for two translational modes and one librational mode in the ammonia solid I near the melting point. We have obtained the Raman frequencies as a function of temperature for some fixed pressure by means of the Gruneisen relation using the volume data from the literature. Our calculated Raman frequencies can be compared with experimental data available in the literature.
Raman frequency shifts calculated from the volume data in naphthalene Ozdemir, H.; Yurtseven, Hasan Hamit (2015-06-15) The Raman frequencies for modes of symmetry Ag and Bg are calculated as functions of temperature (at atmospheric pressure) and pressure (at room temperature) using the observed volume data from the literature through the mode Gruneisen parameters in naphthalene. By determining the temperature and pressure dependence of the isobaric (gamma(P)) and isothermal (gamma(T)) mode Gruneisen parameters, respectively, the Raman frequencies of the modes which were calculated, are in good agreement with the observed fr...
Raman Study of Solid Nitrogen in the beta Phase and Close to the Melting Line Iseri, E. Cetinbas; Yurtseven, Hasan Hamit (Walter de Gruyter GmbH, 2013-02-01) This study gives the Raman frequencies calculated as functions of temperature and pressure for the lattice modes in the solid beta phase and close to the melting line (beta-fluid transition). The experimental volume data from the literature is used to calculate the Raman frequencies for the molecular nitrogen system. Some observed Raman frequencies are also used as the initial data to perform our calculations given here.
Raman bandwidths calculated for the librational ( a -phase) and internal (8, d loc and d phases) modes in solid N 2 using pseudospin-phonon coupling (PS) and energy-fluctuation (EF) models Yurtseven, Hasan Hamit (Elsevier BV, 2020-10-01) This study gives the calculation of the Raman bandwidths using the models of the pseudospin-phonon coupling (PS) and energy fluctuation (EF) where the Raman frequency calculated from the molecular field theory, is considered as the order parameter close to the phase transitions in nitrogen. In particular, we study the temperature dependence of the Raman bandwidths and frequency shifts of the Eg librational mode (zero pressure) and the internal modes of and (at various pressures) for the solid nitrogen by ...
RAMAN FREQUENCIES CALCULATED FROM THE VOLUME DATA AS A FUNCTION OF TEMPERATURE AT HIGH PRESSURES FOR THE DISORDERED PHASE II OF NH4I Yurtseven, Hasan Hamit (World Scientific Pub Co Pte Lt, 2011-02-10) In this study, we calculate the Raman frequencies as a function of temperature for the fixed pressures of 706, 1080 and 6355 bars using the volume data for phase 11 of ammonium iodide. The Raman frequencies calculated here are for the translational optic nu(5) TOM (125 cm(-1)) lattice mode that is located at the zone boundary (M point) of the Brillouin zone of phase II for NH4I. For this calculation the volume data obtained at zero pressure, is used through the mode Gruneisen parameter for the disordered ph...

Citation Formats

H. H. Yurtseven, “Raman Frequencies calculated as a function of pressure for the rotatory lattice mode in ammonia solid II near the melting point,” CHINESE JOURNAL OF PHYSICS, pp. 209–217, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55282.