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Temperature and pressure dependence of the mode Gruneisen parameters close to the melting point in hexagonal ice
Date
2007-02-01
Author
Karacali, H.
Yurtseven, Hasan Hamit
Metadata
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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.
Subject Keywords
Instrumentation
,
Analytical Chemistry
,
Spectroscopy
,
Atomic and Molecular Physics, and Optics
URI
https://hdl.handle.net/11511/35227
Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
DOI
https://doi.org/10.1016/j.saa.2006.02.064
Collections
Department of Physics, Article
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This study gives our calculation for the damping constant, using the expressions derived for an Ising pseudospin-phonon coupled system in the ammonium halides (NH4Cl and NH4Br). For this calculation of the damping constant, we use the temperature dependence of the order parameter calculated from the molecular field theory. We predict here the damping constants for the v(5) (174 cm(-1)) and v(5) (177 cm(-1)) Raman modes of NH4Cl and NH4Br, respectively, below T-lambda and compare them with our observed bandw...
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Spectroscopic modification of the Pippard relation applied for the translational mode in ammonia solid II near the melting point
Yurtseven, Hasan Hamit; Yıldız, İlker (Elsevier BV, 2005-09-01)
This study gives our calculation for the frequency shifts 1/V(partial derivative v/partial derivative T)(P) and the specific heat C-p near the melting point in the ammonia solid II. We establish a linear relationship between C-p and 1/v(partial derivative v/partial derivative T)(P) using the Raman frequencies of the translational mode which we calculated in this system. This leads to the validity of the spectroscopic modification of the first Pippard relation in the ammonia solid II near the melting point. ...
Temperature and pressure dependence of the Raman frequency shifts near the melting point in ice I
Yurtseven, Hasan Hamit (Elsevier BV, 2006-06-01)
This study examines the validity of the spectroscopic modification of the Pippard relations for the hexagonal ice (ice I) close to the melting point. A linear variation of the specific heat C-P with the frequency shifts 1/nu(partial derivative nu/partial derivative P)(p) is obtained for ice I. This linearity is also obtained between thermal expansivity alpha P and the frequency shifts (partial derivative nu/partial derivative P)(T) close to the melting point in this crystal.
Pressure dependence of the Raman frequencies for the translational mode in ammonia solid II
Yurtseven, Hasan Hamit (Elsevier BV, 2006-12-01)
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.
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BibTeX
H. Karacali and H. H. Yurtseven, “Temperature and pressure dependence of the mode Gruneisen parameters close to the melting point in hexagonal ice,”
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
, pp. 487–492, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35227.