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Thermal expansion of L-ascorbic acid

Abstract : The specific volume of vitamin C has been investigated by X-ray powder diffraction as a function of temperature from 110 K up to complete degradation around 440 K. Its thermal expansion is relatively small in comparison with other organic compounds with an expansivity α v of 1.2(3) × 10 −4 K −1. The structure consists of strongly bound molecules in the ac plane through a dense network of hydrogen bonds. The thermal expansion is anisotropic. Along the b axis, the expansion has most leeway and is about 10 times larger than in the other directions.
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Contributor : Ivo Rietveld Connect in order to contact the contributor
Submitted on : Monday, December 16, 2019 - 4:52:52 PM
Last modification on : Sunday, June 26, 2022 - 12:13:23 PM

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Béatrice Nicolai, Maria Barrio, Josep Lluis Tamarit, René Céolin, Ivo B. Rietveld. Thermal expansion of L-ascorbic acid. The European Physical Journal. Special Topics, EDP Sciences, 2017, 226, pp.905-912. ⟨10.1140/epjst/e2016-60232-6⟩. ⟨hal-02414626⟩



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