New Data on Compressibility of Molecular Fullerites C60and C70
| Autor: | A. G. Lyapin, O. F. Yagafarov, M. V. Kondrin, E. L. Gromnitskaya, Vadim V. Brazhkin, A. V. Bogdan |
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| Rok vydání: | 2010 |
| Předmět: |
Phase transition
Bulk modulus Materials science Condensed matter physics Organic Chemistry Intermolecular force Atmospheric temperature range Atomic and Molecular Physics and Optics Compressibility General Materials Science Ultrasonic sensor Crystallite Physical and Theoretical Chemistry Elastic modulus |
| Zdroj: | Fullerenes, Nanotubes and Carbon Nanostructures. 18:406-411 |
| ISSN: | 1536-4046 1536-383X |
| DOI: | 10.1080/1536383x.2010.487437 |
| Popis: | Here we present an improved ultrasonic study of the elastic moduli of polycrystalline fullerites C60 and C70 in the temperature range 77–340 K at pressures up to 2.5 GPa. The elastic properties of these fullerites at normal conditions were accurately measured using an ultrasonic technique. The anomalies in the dependencies of elastic characteristics were identified as phase transition points. The observed high values of the pressure derivatives of the bulk modulus of C60 are discussed in terms of the central m-n power potential and contribution of non-central intermolecular forces. |
| Databáze: | OpenAIRE |
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