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Temperature and pressure dependence of the Raman frequency shifts near the melting point in ice I
Date
2006-06-01
Author
Yurtseven, Hasan Hamit
Metadata
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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.
Subject Keywords
Instrumentation
,
Analytical Chemistry
,
Spectroscopy
,
Atomic and Molecular Physics, and Optics
URI
https://hdl.handle.net/11511/43156
Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
DOI
https://doi.org/10.1016/j.saa.2005.06.050
Collections
Department of Physics, Article
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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.
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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.
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The experimental data for the specific heat C-p is analyzed at various temperatures close to the nematic-isotropic liquid (T-NI = 180.5 degrees C) and the solid-nematic (T-SN = 168.9 degrees C) transitions in anisaldazine.
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. ...
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H. H. Yurtseven, “Temperature and pressure dependence of the Raman frequency shifts near the melting point in ice I,”
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
, pp. 771–777, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/43156.