scholarly journals Structural properties ofSr0.61Ba0.39Nb2O6in the temperature range10–500Kinvestigated by high-resolution neutron powder diffraction and specific heat measurements

2006 ◽  
Vol 74 (13) ◽  
Author(s):  
J. Schefer ◽  
D. Schaniel ◽  
V. Pomjakushin ◽  
U. Stuhr ◽  
V. Petříček ◽  
...  
Keyword(s):  
High Resolution ◽  
Specific Heat ◽  
Structural Properties ◽  
Powder Diffraction ◽  
Neutron Powder Diffraction

High Resolution Neutron Powder Diffraction Studies of the Ferroelastic Phase Transition in LaNbO4

1989 ◽  
Vol 166 ◽  
Author(s):  
W I F David
Keyword(s):  
Phase Transition ◽  
High Resolution ◽  
Powder Diffraction ◽  
Structural Phase ◽  
Strain Tensor ◽  
Neutron Powder Diffraction ◽  
Line Broadening ◽  
Neutron Powder Diffraction Data ◽  
Ferroelastic Phase Transition ◽  
Principal Axes

ABSTRACTAnalysis of high resolution neutron powder diffraction data of ferroelastic LaNbO4 indicates a monoclinic to tetragonal structural phase transition that is accompanied by anomalous line broadening. The origins of this line broadening have been investigated using a novel modification of the Rietveld technique. The results show that strain broadening is associated with the ferroelastic phase transition both above and below the transition temperature. This anomalous ‘microstrain’ is well-described by a second rank strain tensor, the principal axes of which are collinear with the spontaneous lattice strain. This phenomenon may be a general feature of proper ferroelastic phase transitions.

High resolution neutron powder diffraction study of the microstrain contribution in Pb(ZrxTi1−x)O3 ceramics

2004 ◽  
Vol 24 (6) ◽  
pp. 1141-1144 ◽  
Author(s):  
J. Frantti ◽  
S. Eriksson ◽  
S. Hull ◽  
S. Ivanov ◽  
V. Lantto ◽  
...  
Keyword(s):  
High Resolution ◽  
Diffraction Study ◽  
Powder Diffraction ◽  
Neutron Powder Diffraction

Equation of state and phase transition of deuterated ammonia monohydrate (ND3⋅D2O) measured by high-resolution neutron powder diffraction up to 500 MPa

2009 ◽  
Vol 131 (15) ◽  
pp. 154503 ◽  
Author(s):  
A. Dominic Fortes ◽  
Emmanuelle Suard ◽  
Marie–Hélène Lemée-Cailleau ◽  
Christopher J. Pickard ◽  
Richard J. Needs
Keyword(s):  
Phase Transition ◽  
High Resolution ◽  
Equation Of State ◽  
Powder Diffraction ◽  
Neutron Powder Diffraction

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
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