Journal
PHASE TRANSITIONS
Volume 82, Issue 7, Pages 497-506Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/01411590903114198
Keywords
phase transition; -alanine; heat capacity; calorimetry; IR-spectroscopy; X-ray diffraction; thermal expansion; solvent inclusions
Categories
Funding
- SB RAS [109]
- RFBR [09-03-00451-a]
- BRHE [NO-008-XI, RUX0-008-NO-06/BP4M08]
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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.
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