EXAFS study of the gallium and iron environments in cation conducting pyrophosphate glasses

Poisson, S.; Berthet, P.; Belkébir, A.; Rulmont, A.

doi:10.1016/0921-4526(94)00766-o

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Main Characterlstics Of the Experimental Spectra1

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1997

1999

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“…The introduction of a trivalent oxide such as AlZ03, Fe& or Ga&3 in their composition increases their chemical stability. EXAFS studies carried out at the Ga and Fe K-edges on glasses prepared in the Na20-(Ga,Fe)2~-PzOs system were previously reported [1,2]. For some compositions, these studies suggest that the glassy network cannot be h i as an association of tetrahedral units but should involve more complex ones such as GafiOll and FeP2011.…”

Section: Introductionmentioning

confidence: 81%

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XANES Study of the Gallium and Iron Environments in Phosphate Based Glasses

Poisson

Berthet

1997

J. Phys. IV France

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Abstrna: Glasses prepared in the NazO-&O,-P205 systems (M=Ga, Fe) have been studied by X-ray absorption -y at the Ga and Fe K-edges. When these atoms are found in 6-fold wordination, striking similarities are found between theu XANES spectra and those of some crystalline diphosphates. From the simulation of the XANES spectrum of crystalline NaFePze using the FEFF6 code, an ordering of the phosphorus atoms linked to the Fe06 octahedra is evidenced in the glasses.

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Section: Introductionmentioning

confidence: 81%

“…XANES spectra were recorded on the EXAFS 1 beam line at LURE-DCI, in the same time as the EXAFS experiments previously reported [1,2]. A smaller energy step was used near the edges: 0.2 eV at the Fe Kedge and 0.5eV at the Ga Kedge.…”

Section: Main Characterlstics Of the Experimental Spectramentioning

confidence: 99%