Investigation into the Palladium-Europium Acetate Reductive Decomposition with Synchrotron Radiation-Based X-ray Diffraction and X-ray Absorption Spectroscopy

2014 ◽  
Vol 640 (12-13) ◽  
pp. 2577-2582 ◽  
Author(s):  
Evgeny Khramov ◽  
Olga Belyakova ◽  
Vadim Murzin ◽  
Alexey Veligzhanin ◽  
Alfred Chernyshov ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Absorption Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Reductive Decomposition ◽  
X Ray Absorption

Iron oxidation dynamics vs. temperature of synthetic potassic-ferro-richterite: a XANES investigation

2018 ◽  
Vol 20 (33) ◽  
pp. 21764-21771 ◽  
Author(s):  
G. Della Ventura ◽  
F. Galdenzi ◽  
G. Cibin ◽  
R. Oberti ◽  
Wei Xu ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Absorption Spectroscopy ◽  
Electronic Transition ◽  
Iron Oxidation ◽  
Structural Rearrangement ◽  
Oxidation Behaviour ◽  
X Ray Diffraction ◽  
Step Process ◽  
X Ray ◽  
X Ray Absorption

We investigated the oxidation behaviour of a synthetic potassic-ferro-richterite up to 750 °C by using simultaneous X-ray absorption spectroscopy and X-ray diffraction experiments with synchrotron radiation. This is a multi-step process implying a structural rearrangement and an electronic transition, which controls the conductivity vs. temperature.

The Relative Merits of Oxides of Hafnium, Cerium and Thorium as Surrogates for Plutonium Oxide in Calcium Phosphate Ceramics

2009 ◽  
Vol 1193 ◽  
Author(s):  
B. L. Metcalfe ◽  
S. K. Fong ◽  
L. A. Gerrard ◽  
I. W. Donald ◽  
E. S. Welch ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Calcination Temperature ◽  
Cerium Oxide ◽  
Absorption Spectroscopy ◽  
Hafnium Oxide ◽  
Intermediate Level ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Absorption ◽  
Additional Phase

AbstractThe choice of surrogate for plutonium oxide for use during the initial stages of research into the immobilization of intermediate level pyrochemical wastes containing plutonium andamericium oxides in a calcium phosphate host has been investigated by powder X-ray diffraction and X-ray absorption spectroscopy. Two non-radioactive surrogates, hafnium oxide and cerium oxide, together with radioactive thorium oxide were compared. Similarities in behaviour were observed for all three surrogates when calcined at the lowest temperature, 750°C but differences became more pronounced as the calcination temperature was increased to 950°C. Although some reaction occurred between all the surrogates and the host to form a substituted whitlockite phase, increasing the temperature led to a significant increase in the cerium reaction and the formation of an additional phase, monazite. Additionally it was observed that the cerium became increasingly trivalent at higher temperatures.

scholarly journals Mechanism of pressure induced amorphization of SnI4: A combined x-ray diffraction—x-ray absorption spectroscopy study

2020 ◽  
Vol 153 (6) ◽  
pp. 064501
Author(s):  
Emiliano Fonda ◽  
Alain Polian ◽  
Toru Shinmei ◽  
Tetsuo Irifune ◽  
Jean-Paul Itié
Keyword(s):  
Absorption Spectroscopy ◽  
Spectroscopy Study ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Absorption

Chromium Environment within Cr-Doped BaAl2O4: Correlation of X-ray Diffraction and X-ray Absorption Spectroscopy Investigations

2015 ◽  
Vol 54 (23) ◽  
pp. 11127-11135 ◽  
Author(s):  
Martina Vrankić ◽  
Biserka Gržeta ◽  
Dirk Lützenkirchen-Hecht ◽  
Sanja Bosnar ◽  
Ankica Šarić
Keyword(s):  
Absorption Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Absorption

scholarly journals Structural dynamics of an iron molybdate catalyst under redox cycling conditions studied with in situ multi edge XAS and XRD

2020 ◽  
Vol 22 (20) ◽  
pp. 11713-11723 ◽  
Author(s):  
Abhijeet Gaur ◽  
Matthias Stehle ◽  
Kristian Viegaard Raun ◽  
Joachim Thrane ◽  
Anker Degn Jensen ◽  
...  
Keyword(s):  
Phase Transformations ◽  
Absorption Spectroscopy ◽  
Structural Dynamics ◽  
Redox Cycling ◽  
X Ray Diffraction ◽  
Iron Molybdate ◽  
X Ray ◽  
X Ray Absorption

Combination of in situ multi-edge X-ray absorption spectroscopy at the Mo K- and Fe K-edges in combination with X-ray diffraction successfully uncovered structural dynamics and phase transformations of an iron molybdate catalyst during redox cycling.

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