On the dimensions of species participating in the growth of ammonium oxalate monohydrate crystals from viscosity data of concentrated aqueous solutions by K. Sangwal, H. Frej, and R. Misztal

Crystal Research and Technology

Cryst. Res. Technol. 39, 705 (2004) - Abstract -

On the dimensions of species participating in the growth of ammonium oxalate monohydrate crystals from viscosity data of concentrated aqueous solutions

K. Sangwal, H. Frej*, and R. Misztal*

Department of Applied Physics, Lublin University of Technology, ul. Nadbystrzycka 38, 20-618 Lublin, Poland
*Institute of Chemistry and Environment Protection, Pedagogical University of Częstochowa, Al. Armii Krajowej 13/15, 42-200 Częstochowa, Poland

Keywords	ammonium oxalate, concentrated aqueous solutions, growth species, viscosity
PACS	61.20.Qg, 66.20.-x
DOI	10.1002/crat.200410242

The experimental data of the temperature and concentration dependence of viscosity of concentrated aqueous ammonium oxalate solutions are analysed using the hole theory of liquids and Einstein's model of viscosity. Analysis of the data revealed that the dimensions of the species participating in the growth of ammonium oxalate monohydrate crystals are 3-5 times larger than the dimensions of individual NH₄⁺ and C₂O₄^2- ions composing them.

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