Heat capacity anomaly in UO2 in the vicinity of 1300K: an improved description based on high resolution X-ray and neutron powder diffraction studies

2005 ◽  
Vol 66 (5) ◽  
pp. 823-831 ◽  
Author(s):  
P. Ruello ◽  
L. Desgranges ◽  
G. Baldinozzi ◽  
G. Calvarin ◽  
T. Hansen ◽  
...  
Keyword(s):  
Heat Capacity ◽  
High Resolution ◽  
Powder Diffraction ◽  
Neutron Powder Diffraction ◽  
X Ray ◽  
Heat Capacity Anomaly

The structure of the calcined aluminophosphate ALPO4-5 determined by high-resolution X-ray and neutron powder diffraction

1996 ◽  
Vol 6 (11) ◽  
pp. 1831 ◽  
Author(s):  
Asilo� J. Mora ◽  
Andrew N. Fitch ◽  
Michael Cole ◽  
Rajan Goyal ◽  
Richard H. Jones ◽  
...  
Keyword(s):  
High Resolution ◽  
Powder Diffraction ◽  
Neutron Powder Diffraction ◽  
X Ray

Structural characterization of La2−xMxCuO4 (M = Sr,Ba) samples by synchrotron x-ray and neutron powder diffraction techniques

1988 ◽  
Vol 3 (6) ◽  
pp. 1327-1335 ◽  
Author(s):  
D. E. Cox ◽  
S. C. Moss ◽  
R. L. Meng ◽  
P. H. Hor ◽  
C. W. Chu
Keyword(s):  
High Resolution ◽  
Rietveld Refinement ◽  
Powder Diffraction ◽  
Structural Characterization ◽  
Neutron Powder Diffraction ◽  
Superconducting Properties ◽  
X Ray Diffraction ◽  
Neutron Data ◽  
X Ray

High-resolution synchrotron x-ray powder diffraction studies on samples of La2−xMxCuO4 (M = Sr,Ba) prepared by standard ceramic techniques show that macroscopic compositional inhomogeneities may exist that are unlikely to be revealed by conventional x-ray diffraction methods. Rietveld refinement of neutron data collected at 200, 50, and 11 K from one such sample, nominally La1.8Sr0.2CuO4, gave satisfactory fits to a tetragonal structure of K2NiF4 type at all three temperatures. However, careful individual peak fits revealed that part of the sample transforms to orthorhombic between 200 and 50 K. It is suggested that this multiphase character has an important influence on the superconducting properties.

scholarly journals Spin-driven phase transitions inZnCr2Se4andZnCr2S4probed by high-resolution synchrotron x-ray and neutron powder diffraction

2009 ◽  
Vol 79 (6) ◽  
Author(s):  
F. Yokaichiya ◽  
A. Krimmel ◽  
V. Tsurkan ◽  
I. Margiolaki ◽  
P. Thompson ◽  
...  
Keyword(s):  
Phase Transitions ◽  
High Resolution ◽  
Powder Diffraction ◽  
Neutron Powder Diffraction ◽  
X Ray

scholarly journals Structural transformations of the La2−xPrxNiO4+δ system probed by high-resolution synchrotron and neutron powder diffraction

2019 ◽  
Vol 48 (1) ◽  
pp. 266-277 ◽  
Author(s):  
Vaibhav Vibhu ◽  
Matthew R. Suchomel ◽  
Nicolas Penin ◽  
François Weill ◽  
Jean-Claude Grenier ◽  
...  
Keyword(s):  
High Resolution ◽  
Powder Diffraction ◽  
Structural Transformations ◽  
Neutron Powder Diffraction ◽  
Rietveld Refinements ◽  
X Ray ◽  
Structural Distortions

Subtle structural distortions in the La2−xPrxNiO4+δ system are investigated using high resolution X-ray powder diffraction and neutron powder diffraction, analyzed by combined Rietveld refinements.

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