X-ray studies of concentrated aqueous solutions
Concentrated aqueous solutions of three transition metal bromides (ZnBr/sub 2/, CuBr/sub 2/, and NiBr/sub 2/) and an alkali bromide (RbBr) have been studied with differential anomalous scattering (DAS) and extended x-ray absorption fine structure (EXAFS). The aq-ZnBr/sub 2/ solutions exhibit considerable inner-shell ion complexing with the formation of tetrahedral complexes about the Zn/sup 2 +/. In aq-CuBr/sub 2/, the Cu/sup 2 +/ has an octahedral coordination shell. Most of the anions are bound directly to the cations in both solutions. In contrast, there are only a few Ni--Br nearest neighbors in aq-NiBr/sub 2/. Instead, cations and anions share hydrating water molecules. Preliminary data show that any ion complexing in aq-RbBr must be weak. These results are in good agreement with published thermodynamic studies.
- Research Organization:
- Department of Applied Physics, Stanford University, Stanford, California 94305
- OSTI ID:
- 6511422
- Journal Information:
- J. Chem. Phys.; (United States), Vol. 87:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AQUEOUS SOLUTIONS
STRUCTURE FACTORS
X-RAY DIFFRACTION
COPPER BROMIDES
NICKEL BROMIDES
RUBIDIUM BROMIDES
ZINC BROMIDES
SCATTERING
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER HALIDES
DIFFRACTION
DISPERSIONS
HALIDES
HALOGEN COMPOUNDS
MIXTURES
NICKEL COMPOUNDS
RUBIDIUM COMPOUNDS
SOLUTIONS
TRANSITION ELEMENT COMPOUNDS
ZINC COMPOUNDS
ZINC HALIDES
360602* - Other Materials- Structure & Phase Studies