Инд. авторы: | Boldyreva E.V., Chesalov Y.A., Drebushchak T.N., Kolesnik E.N., Kovalevskaya Y.A., Paukov I.E., Drebushchak V.A., Kolesov B.A. |
Заглавие: | Phase transition at 204-250 K in the crystals of -alanine: Kinetically irreproduceable, or an artefact? |
Библ. ссылка: | Boldyreva E.V., Chesalov Y.A., Drebushchak T.N., Kolesnik E.N., Kovalevskaya Y.A., Paukov I.E., Drebushchak V.A., Kolesov B.A. Phase transition at 204-250 K in the crystals of -alanine: Kinetically irreproduceable, or an artefact? // Phase Transitions. - 2009. - Vol.82. - Iss. 7. - P.497-506. - ISSN 0141-1594. |
Внешние системы: | DOI: 10.1080/01411590903114198; SCOPUS: 2-s2.0-68949086156; |
Реферат: | eng: The crystals and the powder samples of -alanine were studied in the wide temperature range by adiabatic calorimetry, differential scanning calorimetry, IR- and Raman spectroscopy and X-ray diffraction. No phase transitions could be observed. A small anomaly observed at about 256 K in the Cp(T) dependences measured for the samples re-crystallized from water was shown to be due to the presence of a small (about 0.14% of the total sample mass) amount of solvent inclusions. This anomaly was not observed in the solvent-free samples, either powders or single crystals. © 2009 Taylor & Francis.
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Ключевые слова: | Calorimetry; NO phase; Powder samples; Solvent free; Solvent inclusions; Temperature range; Calorimeters; Differential scanning calorimetry; Diffraction; Raman spectroscopy; Single crystals; Solvents; Spacecraft instruments; Spatial variables measurement; Specific heat; Thermal expansion; Thermal stress; X ray diffraction; X ray diffraction analysis; Phase transitions; Powders; IR-spectroscopy; Heat capacity; Adiabatic calorimetry; -alanine; X-ray diffraction; Thermal expansion; Solvent inclusions; Phase transition; IR-spectroscopy; -alanine; Heat capacity; |
Издано: | 2009 |
Физ. характеристика: | с.497-506 |