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Article type: Research Article
Authors: Badyal, Y.S. | Simonson, J.M. | Annis, B.K. | Londono, J.D.
Affiliations: Aqueous Chemistry and Geochemistry Group, Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, 4500S, MS-6110, Oak Ridge, TN 37831-6110, USA | Materials Chemistry Group, Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6110, USA
Note: [] Corresponding author. Fax: +1-865-574-4961. E-mail: [email protected]
Note: [] Present address: E.I. DuPont, Experimental Station Lab., Wilmington, Delaware 19880, USA
Abstract: The technique of neutron diffraction with isotope substitution has been used to probe the hydration structure around the Ni2+ ion in a concentrated aqueous solution of 3.87 m NiCl2. The scattering from two heavy water solutions containing, respectively, nickel in natural abundance and enriched in the 60Ni isotope, were measured under ambient conditions on the GLAD instrument at the Intense Pulsed Neutron Source, Argonne, using time-of-flight neutron diffraction. Because there have been several earlier neutron measurements, aqueous NiCl2 is widely regarded as a reference system for studies of hydration in aqueous solution. An unexpectedly large difference in deuterium enrichment between our heavy water solutions was detected, initially from analysis of the scattering data. This imbalance, although on the face of it undesirable, has yielded a useful opportunity to gain insights into the effects of such a systematic error on the present results by comparing them to those from earlier measurements.
Keywords: Neutron, Isotope, Aqueous, Solution, Hydration, Structure
DOI: 10.1080/10238160290024633
Journal: Journal of Neutron Research, vol. 10, no. 1, pp. 19-29, 2002
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