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- W2017415540 abstract "Samples of spinel CuA1204 prepared at 639°C and 952°C were studied by structural analysis of their X-ray diffraction powder patterns and their X-ray absorption fine structure (EXAFS). The diffraction analysis showed that 40% of the cupric ions were in octahedral sites. The results were identical within lσ using three datasets, two for the high temperature preparation and one for the low temperature preparation. The cation distribution between the two coordination environments, octahedral and tetrahedral, is consistent with the extended X-ray absorption fine structure, the EXAFS showing 45% of the cupric ions in octahedral environments. The samples were deficient in cupric ions, more closely modeling the case for supported transition metal ion catalysts; the EXAFS refinement explicitly treats the presence of cation vacancies in the spinel lattice. The implications of the constant cation distribution for the two preparations at different temperatures is discussed with regard to the forces determining cation site locations in the bulk and on the surface of the transition aluminas relevant to supported transition metal ion catalysts." @default.
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- W2017415540 date "1985-12-01" @default.
- W2017415540 modified "2023-09-23" @default.
- W2017415540 title "The structure of copper aluminate: cation distribution at different temperatures and its implications for Cu/A1203 catalysts" @default.
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- W2017415540 doi "https://doi.org/10.1016/s0166-9834(00)81760-1" @default.
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