Pr2M2O7 (M=Zr, Hf) Local and Crystal Structure Changes in a Fluorite-Pyrochlore Phase Transition Full article
Conference |
Международная конференция «Плазменные, лазерные исследования и технологии» (ПЛИТ 2016) 25-27 Jan 2016 , Москва |
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Journal |
Journal of Physics: Conference Series
ISSN: 1742-6588 , E-ISSN: 1742-6596 |
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Output data | Year: 2016, Volume: 747, Article number : 012038, Pages count : 5 DOI: 10.1088/1742-6596/747/1/012038 | ||||
Tags | NANOCRYSTALLINE STRUCTURES; Ln2HF2O7; Ln; SYSTEMS; Gd; Dy | ||||
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Abstract:
The formation of nanocrystal powders of Pr2M2O7 (M=Zr, Hf) compounds upon calcinations up to 1400°C has been investigated by using of X-ray absorption fine structure (XAFS) spectroscopy combined with X-ray powder diffraction (XRD). The structure ordering upon calcination was estimated independently from XRD and EXAFS data. It was found that the phase transition fluorite-pyrochlore occurs at calcination temperature in the range of 900–1000°C. The appearance of the ordered pyrochlore structure at calcination temperatures above 1000°C was manifested as splitting of the first oxygen coordination shell of the local praseodymium environment and supported by a sharp reduction of the Debye-Waller factor values of interatomic bonds. Besides we observed the L3-Hf X-ray absorption near edge line shape splitting with increasing of annealing temperature of amorphous precursor due to crystal field influence in high ordered pyrochlore-type structure.
Cite:
Menushenkov A.P.
, Popov V.V.
, Gaynanov B.R.
, Zubavichus Y.V.
Pr2M2O7 (M=Zr, Hf) Local and Crystal Structure Changes in a Fluorite-Pyrochlore Phase Transition
Journal of Physics: Conference Series. 2016. V.747. 012038 :1-5. DOI: 10.1088/1742-6596/747/1/012038 WOS Scopus РИНЦ
Pr2M2O7 (M=Zr, Hf) Local and Crystal Structure Changes in a Fluorite-Pyrochlore Phase Transition
Journal of Physics: Conference Series. 2016. V.747. 012038 :1-5. DOI: 10.1088/1742-6596/747/1/012038 WOS Scopus РИНЦ
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Dates:
Submitted: | Sep 1, 2016 |
Published print: | Sep 1, 2016 |
Published online: | Sep 21, 2016 |
Identifiers:
Web of science | WOS:000387066400038 |
Scopus | 2-s2.0-84992154232 |
Elibrary | 27581546 |
Chemical Abstracts | 2016:1945889 |
OpenAlex | W2522931050 |