Abstract
Aqueous solutions of lutetium nitrate over a wide range of concentrations are studied by X-ray diffraction under standard temperature and pressure. The low-angle peaks in experimental scattering intensity curves are interpreted. It is shown that the structure of these solutions can be of two types. It is found that a saturated solution and solutions concentrated to a molar ratio of 1: 20 have a quasi-crystalline structure resulting from interionic interactions. It is determined that dilute solutions form a water-like structure characterized by a tetrahedral network of hydrogen bonds between the water molecules. It is found that low-angle peaks also appear in the intensity curves of dilute solutions; this proves that the so-called “long-range” order is preserved in these solutions. It is revealed that in all the studied systems, the contributions to the total scattering pattern that are responsible for the occurrence of pre-peaks are intercationic interactions.
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Original Russian Text © P.R. Smirnov, O.V. Grechin, V.N. Trostin, 2014, published in Zhurnal Fizicheskoi Khimii, 2014, Vol. 88, No. 2, pp. 264–268.
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Smirnov, P.R., Grechin, O.V. & Trostin, V.N. Concentration dependence of the structure of aqueous solutions of lutetium nitrate according to X-ray diffraction. Russ. J. Phys. Chem. 88, 250–253 (2014). https://doi.org/10.1134/S0036024414020253
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DOI: https://doi.org/10.1134/S0036024414020253