Energy dispersive X-ray diffraction analysis of NdBr3 at pressures up to 52 GPa

1993 ◽  
Vol 193 (1-2) ◽  
pp. 306-308 ◽  
Author(s):  
J.R. Peterson ◽  
S. Heathman ◽  
U. Benedict
Keyword(s):  
Diffraction Analysis ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Symmetry Collapse due to the Presence of Worm-Aromaticity in Ge244-

2021 ◽  
Author(s):  
Hong-Lei Xu ◽  
Nikolay Tkachenko ◽  
Alvaro Muñoz-Castro ◽  
Alexander Boldyrev ◽  
Zhong-Ming Sun
Keyword(s):  
Theoretical Analysis ◽  
Diffraction Analysis ◽  
Structural Characteristic ◽  
Vital Role ◽  
Energy Dispersive ◽  
Electron Delocalization ◽  
Global Symmetry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Atom Cluster

Abstract In this work, we synthesized and isolated a continuous 24-atom cluster Ge244−, which was characterized by X-ray diffraction analysis and Energy-dispersive X-ray spectroscopy, showing an elongated worm-like structural characteristic. Theoretical analysis reveals that electron delocalization plays a vital role in the formation and stabilization of the prolate cluster. In contrast with carbon atoms, 4s orbitals of Ge-atoms do not easily hybridize with 4p orbitals and s-type lone-pairs could be localized with high occupancy. Thus, there are not enough electrons to form a stable symmetrical fullerene-like structure such as C24 fullerene. Three aromatic units with two [Ge9] and one [Ge6] species, connected by classical 2c-2e Ge-Ge σ-bonds, have been aligned together forming three independent shielding cones (worm-aromaticity) and eventually caused a collapse of the global symmetry of the prolate cluster.

Micro Energy Dispersive X-Ray Diffraction Analysis by Polycapillary X-Ray Optics Focusing

2018 ◽  
Vol 38 (12) ◽  
pp. 1230002
Author(s):  
段泽明 Duan Zeming ◽  
姜其立 Jiang Qili ◽  
刘俊 Liu Jun ◽  
潘秋丽 Pan Qiuli ◽  
程琳 Cheng Lin
Keyword(s):  
Diffraction Analysis ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
Ray Optics ◽  
X Ray

Synchrotron radiation energy-dispersive X-ray diffraction analysis of salt distribution in Lépine limestone

The Analyst ◽  
2005 ◽  
Vol 130 (7) ◽  
pp. 1006 ◽  
Author(s):  
Ioannis Ioannou ◽  
Christopher Hall ◽  
William D. Hoff ◽  
Victoria A. Pugsley ◽  
Simon D. M. Jacques
Keyword(s):  
Synchrotron Radiation ◽  
Diffraction Analysis ◽  
Radiation Energy ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
X Ray ◽  
Salt Distribution

High-Speed Retained Austenite Analysis with an Energy Dispersive X-Ray Diffraction Technique

1973 ◽  
Vol 17 ◽  
pp. 124-138 ◽  
Author(s):  
A. P. Voskamp
Keyword(s):  
Diffraction Analysis ◽  
Retained Austenite ◽  
High Speed ◽  
Conventional Technique ◽  
Energy Dispersive ◽  
Correction Factors ◽  
X Ray Diffraction ◽  
Time Saving ◽  
X Ray

SummaryA time saving method has been applied for the determination of retained austenite.The method involved is based on the approach of energy dispersive X-ray diffraction analysis. With this approach, polychromatic radiation from the X-ray tube is used and diffraction maxima will occur at a fixed angle 2θ in as many wavelengths or energies as “d“ values are present.Giessen and Gordon published the first application of this method to powder diffraction analysis in 1968 for the identification of crystal structures. As the determination of retained austenite is a quantitative type of analysis, based upon identification of the crystal structure, the new approach should also be applicable in principle.With almost 100 samples of unknown austenite content, experiments have been carried out both with the conventional and the energy dispersive X-ray diffraction technique. The results obtained are closely comparable and the retained austenite values together with the errors are shown.For these measurements, experiments have been carried out with the energy dispersive technique to determine the relation between the known concentration of retained austenite in a number of standards and the intensity correction factors (R). The results obtained from these experiments have shown good reproducibility of the intensity correction factors.Using this technique, a five-fold reduction in analysis time is possible over the conventional technique with no reduction in accuracy.

scholarly journals In Situ Energy Dispersive X-Ray Diffraction Analysis of the Temperature-Pressure Stability of Co-Fe-(Ta, W)-B Alloys

2008 ◽  
Vol 113 (1) ◽  
pp. 79-82 ◽  
Author(s):  
R. Kanász ◽  
J. Bednarčík ◽  
K. Saksl ◽  
R. Nicula ◽  
M. Stir ◽  
...  
Keyword(s):  
Diffraction Analysis ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pressure Stability
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