Temperature and pressure dependence of the Raman frequency shifts near the melting point in ice I

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.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

Suggestions

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.
Temperature dependence of the damping constant and the order parameter close to the lambda phase transitions in ammonium halides
Yurtseven, Hasan Hamit (Elsevier BV, 2006-10-01)
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...
Temperature dependence of the specific heat of anisaldazine close to phase transitions
Kilit, E.; Yurtseven, Hasan Hamit (Elsevier BV, 2008-04-15)
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. ...
Citation Formats
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.