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Heat capacity of β-alanine in a temperature range between 6 and 300 K

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Abstract

Thermodynamic properties of β-alanine in the temperature range 6.3–301 K were studied. No phase transitions were observed for the sample specially prepared to contain no solvent inclusions. At 298.15 K the calorimetric entropy and the difference in the enthalpy values are equal, respectively, to 126.6 JK−1 mol−1 and 19.220 Jmol−1. The C p (T) in the temperature range 6–16 K can be well described by Debye equation C p  = AT 3. A comparison of the data on the entropies of glycine polymorphs and of β-alanine was used to show, that the empirical Parks–Huffman rule holds in the case of these compounds.

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Notes

  1. The Cp(T) curve measured for the sample with solvent inclusions had a pronounced peak at about 256 K, corresponding to melting of inclusions (about 0.14% of the total sample mass), which could be erroneously taken for a phase transition in β-alanine.

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Acknowledgments

The study was supported by an Interdisciplinary Integration Project of the SB RAS № 49, a grant from RFBR (05-03-32468), and BRHE grants NO-008-XI and RUX0-008-NO-06. The authors acknowledge the assistance of Mr. A. Zhilin with the preparation of the inclusions-free sample and of Dr. T.N. Drebushchak—with its X-ray diffraction characterization.

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Authors and Affiliations

  1. Institute of Inorganic Chemistry SB RAS, pr. Ac. Lavrentieva 3, 630090, Novosibirsk, Russia

    Igor E. Paukov, Yulia A. Kovalevskaya & Valery A. Drebushchak

  2. REC-008 Molecular Design and Ecologically Safe Technologies, Novosibirsk State University, ul. Pirogova 2, 630090, Novosibirsk, Russia

    Elena V. Boldyreva & Valery A. Drebushchak

  3. Institute of Solid State Chemistry and Mechanochemistry SB RAS, ul. Kutateladze, 18, 630128, Novosibirsk, Russia

    Elena V. Boldyreva

  4. Institute of Geology and Mineralogy SB RAS, pr. Koptyuga 3, 630090, Novosibirsk, Russia

    Valery A. Drebushchak

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  1. Igor E. Paukov
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  2. Yulia A. Kovalevskaya
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  3. Elena V. Boldyreva
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  4. Valery A. Drebushchak
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Correspondence to Elena V. Boldyreva.

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Paukov, I.E., Kovalevskaya, Y.A., Boldyreva, E.V. et al. Heat capacity of β-alanine in a temperature range between 6 and 300 K. J Therm Anal Calorim 98, 873–876 (2009). https://doi.org/10.1007/s10973-009-0104-6

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  • DOI: https://doi.org/10.1007/s10973-009-0104-6

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