https://doi.org/10.1140/epjst/e2016-60232-6
Regular Article
Thermal expansion of L-ascorbic acid*
1 Caracterisation des Matériaux Moléculaires à Activité Thérapeutique (CAMMAT), Faculté de Pharmacie, Université Paris Descartes, 75006 Paris, France
2 Grup de Caracteritzacio de Materials (GCM), Departament de Fisica, Campus Diagonal-Besòs, Universitat Politecnica de Catalunya, EEBE, Eduard Maristany, 10-14, 08019 Barcelona, Spain
3 LETIAM, EA7357, IUT Orsay, université Paris Sud, rue Noetzlin, 91405 Orsay Cedex, France
a e-mail: beatrice.nicolai@parisdescartes.fr
Received: 21 July 2016
Revised: 25 November 2016
Published online: 18 April 2017
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 αv 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.
Supplementary material in the form of one pdf file available from the Journal web page at https://doi.org/10.1140/epjst/e2016-60232-6
© EDP Sciences, Springer-Verlag, 2017
