scholarly journals New developments in micro-X-ray diffraction and X-ray absorption spectroscopy for high-pressure research at 16-BM-D at the Advanced Photon Source

2015 ◽  
Vol 86 (7) ◽  
pp. 072205 ◽  
Author(s):  
Changyong Park ◽  
Dmitry Popov ◽  
Daijo Ikuta ◽  
Chuanlong Lin ◽  
Curtis Kenney-Benson ◽  
...  
Keyword(s):  
High Pressure ◽  
Absorption Spectroscopy ◽  
X Ray Diffraction ◽  
New Developments ◽  
X Ray ◽  
X Ray Absorption ◽  
Photon Source

scholarly journals High pressure polymorphism of β-TaON

2014 ◽  
Vol 43 (25) ◽  
pp. 9647-9654 ◽  
Author(s):  
K. Woodhead ◽  
S. Pascarelli ◽  
A. L. Hector ◽  
R. Briggs ◽  
N. Alderman ◽  
...  
Keyword(s):  
High Pressure ◽  
Raman Scattering ◽  
Ambient Temperature ◽  
Structural Transformation ◽  
Absorption Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pressure Behavior ◽  
Diamond Anvil ◽  
X Ray Absorption

The high pressure behavior of TaON was studied using a combination of Raman scattering, synchrotron X-ray diffraction, and X-ray absorption spectroscopy in diamond anvil cells to 70 GPa at ambient temperature to reveal evidence for a new structural transformation near 30 GPa.

ZnTe at high pressure: X-ray-absorption spectroscopy and x-ray-diffraction studies

1993 ◽  
Vol 48 (12) ◽  
pp. 8683-8693 ◽  
Author(s):  
A. San-Miguel ◽  
A. Polian ◽  
M. Gauthier ◽  
J. P. Itié
Keyword(s):  
High Pressure ◽  
Absorption Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Absorption

Halogens molecular modifications with high pressure: the case of iodine

2021 ◽  
Author(s):  
Jingming Shi ◽  
Emiliano Fonda ◽  
Silvana Botti ◽  
Miguel A. L. Marques ◽  
Toru Shinmei ◽  
...  
Keyword(s):  
High Pressure ◽  
Absorption Spectroscopy ◽  
Diatomic Molecules ◽  
Giant Planets ◽  
Atomistic Modeling ◽  
X Ray ◽  
X Ray Absorption

Metallization and dissociation are key transformations in diatomic molecules at high densities particularly significant for modeling giant planets. Using X-ray absorption spectroscopy and atomistic modeling, we demonstrate that in halogens,...

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
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