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Pippard relation modified for the rotatory lattice mode in ammonia solid II
Date
2005-01-01
Author
Yurtseven, Hasan Hamit
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In this study we obtain a linear variation of the specific heat Cp with the Raman frequency shifts 1/v (partial derivative v/partial derivative T)p for the rotatory lattice (librational) mode in the ammonia solid II near the melting point. From this linearity, we deduce values of the slope dP(m)/dT for the pressures of 3.65, 5.02 and 6.57 kbars in the ammonia solid II. Our calculated value of dP(m)/dT for the pressure of 3.65 kbar, is in good agreement with the experimentally measured value in the P-T phase diagram of this crystalline system. This indicates that the first Pippard relation modified for the rotatory lattice mode in the ammonia solid II, is satisfactory near the melting point.
Subject Keywords
Physical and Theoretical Chemistry
,
General Materials Science
,
Mechanics of Materials
,
Condensed Matter Physics
URI
https://hdl.handle.net/11511/37534
Journal
HIGH TEMPERATURE MATERIALS AND PROCESSES
DOI
https://doi.org/10.1515/htmp.2005.24.5.315
Collections
Department of Physics, Article