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Title: Coordination (hydration) of rare earth ions in aqueous chloride solutions from x-ray diffraction. III. SmCl/sub 3/, EuCl/sub 3/, and series behavior

Abstract

The inner sphere water coordination of Sm/sup 3 +/ and Eu/sup 3 +/ in concentrated (3.23 m) aqueous chloride solutions was obtained from x-ray diffraction measurements at 25 /sup 0/C. The average water coordination is 8.8 for Sm/sup 3 +/ and 8.3 for Eu/sup 3 +/. The average RE/sup 3 +/--H/sub 2/O distances are 2.474 A for Sm/sup 3 +/ and 2.450 A for Eu/sup 3 +/. The average RE/sup 3 +/xxxCl/sup -/ ion pair distances occur near 4.9 A. A careful examination of the x-ray diffraction results for ten rare earth chloride solutions indicates that the inner sphere water coordination of the rare earth ions in aqueous solutions decreases from nine to eight due to the decreasing rare earth ionic radii. The ions La/sup 3 +/ through Nd/sup 3 +/ are nine coordinated, those between Nd/sup 3 +/ and Tb/sup 3 +/ are transitional between nine and eight, and those from Tb/sup 3 +/ to Lu/sup 3 +/ are eight coordinated.

Authors:
;
Publication Date:
Research Org.:
Ames Laboratory-USDOE, Department of Physics, and Department of Chemistry, Iowa State University, Ames, Iowa 50011
OSTI Identifier:
5400728
Resource Type:
Journal Article
Journal Name:
J. Chem. Phys.; (United States)
Additional Journal Information:
Journal Volume: 73:1
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; EUROPIUM CHLORIDES; HYDRATION; SAMARIUM CHLORIDES; AQUEOUS SOLUTIONS; X-RAY DIFFRACTION; CHLORIDES; CHLORINE COMPOUNDS; COHERENT SCATTERING; DIFFRACTION; DISPERSIONS; EUROPIUM COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; MIXTURES; RARE EARTH COMPOUNDS; SAMARIUM COMPOUNDS; SCATTERING; SOLUTIONS; SOLVATION; 400201* - Chemical & Physicochemical Properties

Citation Formats

Habenschuss, A., and Spedding, F.H. Coordination (hydration) of rare earth ions in aqueous chloride solutions from x-ray diffraction. III. SmCl/sub 3/, EuCl/sub 3/, and series behavior. United States: N. p., 1980. Web.
Habenschuss, A., & Spedding, F.H. Coordination (hydration) of rare earth ions in aqueous chloride solutions from x-ray diffraction. III. SmCl/sub 3/, EuCl/sub 3/, and series behavior. United States.
Habenschuss, A., and Spedding, F.H. Tue . "Coordination (hydration) of rare earth ions in aqueous chloride solutions from x-ray diffraction. III. SmCl/sub 3/, EuCl/sub 3/, and series behavior". United States.
@article{osti_5400728,
title = {Coordination (hydration) of rare earth ions in aqueous chloride solutions from x-ray diffraction. III. SmCl/sub 3/, EuCl/sub 3/, and series behavior},
author = {Habenschuss, A. and Spedding, F.H.},
abstractNote = {The inner sphere water coordination of Sm/sup 3 +/ and Eu/sup 3 +/ in concentrated (3.23 m) aqueous chloride solutions was obtained from x-ray diffraction measurements at 25 /sup 0/C. The average water coordination is 8.8 for Sm/sup 3 +/ and 8.3 for Eu/sup 3 +/. The average RE/sup 3 +/--H/sub 2/O distances are 2.474 A for Sm/sup 3 +/ and 2.450 A for Eu/sup 3 +/. The average RE/sup 3 +/xxxCl/sup -/ ion pair distances occur near 4.9 A. A careful examination of the x-ray diffraction results for ten rare earth chloride solutions indicates that the inner sphere water coordination of the rare earth ions in aqueous solutions decreases from nine to eight due to the decreasing rare earth ionic radii. The ions La/sup 3 +/ through Nd/sup 3 +/ are nine coordinated, those between Nd/sup 3 +/ and Tb/sup 3 +/ are transitional between nine and eight, and those from Tb/sup 3 +/ to Lu/sup 3 +/ are eight coordinated.},
doi = {},
journal = {J. Chem. Phys.; (United States)},
number = ,
volume = 73:1,
place = {United States},
year = {1980},
month = {7}
}