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

Hydroxyapatite Precursor Phases Identification by X-Ray Diffraction Using Synchrotron Radiation

2007 ◽  
Vol 330-332 ◽  
pp. 115-118 ◽  
Author(s):  
Silvia R. A. Santos ◽  
Antonella M. Rossi ◽  
Marcelo Henrique Prado da Silva
Keyword(s):  
Synchrotron Radiation ◽  
Diffraction Analysis ◽  
Intermediate Phase ◽  
Octacalcium Phosphate ◽  
Alkali Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Low Intensity ◽  
Synchrotron Light ◽  
Precursor Phases

The present study presents the relevance of X-ray diffraction analysis using synchrotron light in the identification of phases with low intensity peaks. Niobium sheets were coated with monetite and then converted to hydroxyapatite in an alkali solution. Octacalcium phosphate was identified as an intermediate phase in the conversion monetite-hydroxyapatite.

Energy-dispersive x-ray diffraction with synchrotron radiation at cryogenic temperatures

1984 ◽  
Vol 55 (6) ◽  
pp. 849-855 ◽  
Author(s):  
E. F. Skelton ◽  
A. W. Webb ◽  
S. B. Qadri ◽  
S. A. Wolf ◽  
R. C. Lacoe ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Energy Dispersive ◽  
Cryogenic Temperatures ◽  
X Ray Diffraction ◽  
X Ray

Fast measuring system of energy dispersive x‐ray diffraction intensity for synchrotron radiation (abstract)

1989 ◽  
Vol 60 (7) ◽  
pp. 2443-2443
Author(s):  
M. Yoshizawa ◽  
H. Sugawara ◽  
K. Jyohtake ◽  
S. Yamagishi ◽  
T. Fukamachi ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Energy Dispersive ◽  
Measuring System ◽  
X Ray Diffraction ◽  
Diffraction Intensity ◽  
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.

Sign in / Sign up

Export Citation Format

Share Document