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Lattice dynamics in crystals of ‘rigid’ hydrocarbons

✍ Scribed by Carlo M. Gramaccioli; Massimo Simonetta; Giuseppe B. Suffritti

Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
504 KB
Volume
20
Category
Article
ISSN
0009-2614

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📜 SIMILAR VOLUMES

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✍ S.H. Walmsley 📂 Article 📅 1983 🏛 Elsevier Science 🌐 English ⚖ 493 KB

The use of the rigid-molecule approximation in the theory of lattice dynamics of molecular crystals leads to hiiherorder kinetic energy terms when anharmonic effects are allowed for. The conventional theory of lattice dynamics is extended to take account of these terms.

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The conlniution to\_btbce dynamics of molecular crystals of polarization interaction due Lo dipoles induced by the molecular multipolar field has been evaluated by calculation of the lattice frequencies of crystalline ammonia\_ It has been found that this contribution is small but not negligible.