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

Evidence for the presence of U–Mo–Al ternary compounds in the U–Mo/Al interaction layer grown by thermal annealing: a coupled micro X-ray diffraction and micro X-ray absorption spectroscopy study

2007 ◽  
Vol 40 (6) ◽  
pp. 1064-1075 ◽  
Author(s):  
Hervé Palancher ◽  
Philippe Martin ◽  
Vivian Nassif ◽  
Remi Tucoulou ◽  
Olivier Proux ◽  
...  
Keyword(s):  
Thermal Annealing ◽  
Absorption Spectroscopy ◽  
Solid Solutions ◽  
Spectroscopy Study ◽  
X Ray Diffraction ◽  
Interaction Layer ◽  
X Ray ◽  
Ternary Compounds ◽  
X Ray Absorption

The systematic presence of the ternary phases U6Mo4Al43and UMo2Al20is reported in a U–Mo/Al interaction layer grown by thermal annealing. This work shows, therefore, the low Mo solubility in UAl3and UAl4binary phases; it contradicts the hypothesis of the formation of (U,Mo)Al3and (U,Mo)Al4solid solutions often admitted in the literature. Using µ-XAS (micro X-ray absorption spectroscopy) at the MoKedge and µ-XRD (micro X-ray diffraction), the heterogeneity of the interaction layer obtained on a γ-U0.85Mo0.15/Al diffusion couple has been precisely investigated. The UMo2Al20phase has been identified at the closest location from the Al side. Moreover, µ-XRD mapping performed on an annealed fuel plate enabled the characterization of the four phases resulting from the γ-U0.85Mo0.15/Al and (U2Mo + α-U)/Al interactions. A strong correlation between the concentrations of UAl4and UMo2Al20and those of UAl3and U6Mo4Al43has been shown.

X-RAY ABSORPTION SPECTROSCOPY STUDY OF Cu-BASED METHANOL CATALYSTS. 2. REDUCED STATE

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-237-C8-242 ◽  
Author(s):  
B. S. CLAUSEN ◽  
B. LENGELER ◽  
B. S. RASMUSSEN ◽  
W. NIEMANN ◽  
H. TOPSØE
Keyword(s):  
Absorption Spectroscopy ◽  
Spectroscopy Study ◽  
X Ray ◽  
X Ray Absorption ◽  
Reduced State

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.

Local structure of Fe in Fe-doped misfit-layered calcium cobaltite: An X-ray absorption spectroscopy study

2013 ◽  
Vol 204 ◽  
pp. 257-265 ◽  
Author(s):  
Natkrita Prasoetsopha ◽  
Supree Pinitsoontorn ◽  
Atipong Bootchanont ◽  
Pinit Kidkhunthod ◽  
Pornjuk Srepusharawoot ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Local Structure ◽  
Spectroscopy Study ◽  
X Ray ◽  
X Ray Absorption

scholarly journals X-ray absorption spectroscopy study on oxygen-deficient hafnium oxide film

2008 ◽  
Vol 100 (4) ◽  
pp. 042044 ◽  
Author(s):  
D-Y Cho ◽  
C-H Min ◽  
J-Y Kim ◽  
J-H Park ◽  
S-J Oh ◽  
...  
Keyword(s):  
Oxide Film ◽  
Absorption Spectroscopy ◽  
Hafnium Oxide ◽  
Spectroscopy Study ◽  
X Ray ◽  
X Ray Absorption
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