Crystalline phase transitions and acoustic phonons behaviour of polymorphic ethanol
| Autor: | B. Kabtoul, R. J. Jiménez Riobóo, Miguel A. Ramos |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Phase transition
Materials science Brillouin Spectroscopy business.industry Phonon Condensed Matter Physics Electronic Optical and Magnetic Materials Condensed Matter::Soft Condensed Matter Condensed Matter::Materials Science Optics Polymorphism (materials science) Chemical physics Melting point Plastic crystal business Glass transition Monoclinic crystal system |
| Zdroj: | The European Physical Journal B. 71:41-45 |
| ISSN: | 1434-6036 1434-6028 |
| DOI: | 10.1140/epjb/e2009-00271-7 |
| Popis: | Ethanol shows a complex scenario of different crystalline phases in the temperature range between its glass transition at Tg = 97 K and its melting point at Tm = 159 K. Brillouin spectroscopy has revealed capable of observing and assessing acoustic phonon changes related to these phase transitions between different crystalline phases (either a plastic-crystal phase or different monoclinic phases). By combining this technique and calorimetric experimental data, we are able to corroborate the existence of at least two stable and two metastable (monoclinic) crystalline phases of pure ethanol. |
| Databáze: | OpenAIRE |
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