Specific heat related to the Raman frequency shifts for the rotatory mode in ammonia solid I close to the melting point
✍ Scribed by H. Karaçalı; H. Yurtseven
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 197 KB
- Volume
- 98
- Category
- Article
- ISSN
- 0022-4073
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✦ Synopsis
This study gives an evidence for the validity of our spectroscopic modification of the Pippard relation as applied to ammonia solid I close to the melting point. We use our calculated frequencies for the rotatory lattice (librational) mode in ammonia solid I for the pressures of 0, 1.93 and 3.07 kbars. We obtain that the specific heat C p varies linearly with the frequency shifts 1=nðqn=qTÞ p for this Raman mode at those pressures studied in this crystalline system. Our values of the slope dP m =dT that we deduced from the linear plots, are not in satisfactory agreement with the experimental values in ammonia solid I near the melting point.