A neutron diffraction study of temperature-induced structural changes in potassium disilicate glass and melt

2004 ◽  
Vol 213 (1-3) ◽  
pp. 89-102 ◽  
Author(s):  
Odile Majérus ◽  
Laurent Cormier ◽  
Georges Calas ◽  
Brigitte Beuneu
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Structural Changes ◽  
Neutron Diffraction Study

A neutron diffraction study of structural changes in one-dimensional K2Pt(CN)4Br0.3 · 3H2O from 77–323°K

1975 ◽  
Vol 17 (1) ◽  
pp. 45-48 ◽  
Author(s):  
J.M. Williams ◽  
F.K. Ross ◽  
M. Iwata ◽  
J.L. Petersen ◽  
S.W. Peterson ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Structural Changes ◽  
Neutron Diffraction Study ◽  
One Dimensional

Neutron Diffraction Study of 1,2,3-Trichlorobenzene-d3

1994 ◽  
Vol 49 (4-5) ◽  
pp. 599-610
Author(s):  
Dirk Groke ◽  
Gernot Heger ◽  
Bernd Peter Schweiss ◽  
Alarich Weiss
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Structural Changes ◽  
Molecular Geometry ◽  
Neutron Diffraction Study ◽  
Strong Variation ◽  
Compound A ◽  
Cell Parameters ◽  
Difference Fourier ◽  
Temperature Factors

In order to explain the observed 35Cl-NQR anomaly of the title compound, a neutron diffraction study on single crystals was carried out at 295 K and 158 K. No significant structural changes concerning phase transitions or molecular disorder between the two experiments were observed. The space group is P21/c = C2h5 with 8 molecules per unit cell. The asymmetric unit contains 2 molecules. The cell parameters were determined to a = 1264(4) pm, b = 825(2) pm, c = 1503(3) pm, ß = 14.3(3)° at 295 K and a = 1243(2)pm, b = 815(1) pm, c = 1494(2) pm, ß = 114.3(1)° at 158 K. The molecules show rigid-body behaviour. No significant changes of the molecular geometry were observed. A strong variation of the temperature factors as function of the temperature was detected. An anharmonicity of the librational potential of the molecules was found by evaluation of the thermal parameters as function of temperature. For verifying the existence of dynamic processes which lead to a bleaching out of the 35Cl-NQR lines difference, Fourier syntheses were calculated. A reorientation or an order-disorder process as suggested by 35Cl-NQR spectroscopy above 230 K could not be confirmed within the error of the experiments. The degree of deuteration of the samples was determined by refinement of the occupation factors of the deuterium sites.

Structural changes in a commercial lithium-ion battery during electrochemical cycling: An in situ neutron diffraction study

2010 ◽  
Vol 195 (24) ◽  
pp. 8258-8266 ◽  
Author(s):  
Neeraj Sharma ◽  
Vanessa K. Peterson ◽  
Margaret M. Elcombe ◽  
Maxim Avdeev ◽  
Andrew J. Studer ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Study ◽  
Lithium Ion Battery ◽  
Structural Changes ◽  
Lithium Ion ◽  
Neutron Diffraction Study ◽  
Electrochemical Cycling ◽  
In Situ Neutron Diffraction

Neutron diffraction study of structural changes in ammonium halides under high pressure

1999 ◽  
Vol 265 (1-4) ◽  
pp. 92-96 ◽  
Author(s):  
A.M Balagurov ◽  
D.P Kozlenko ◽  
B.N Savenko ◽  
V.P Glazkov ◽  
V.A Somenkov ◽  
...  
Keyword(s):  
High Pressure ◽  
Neutron Diffraction ◽  
Diffraction Study ◽  
Structural Changes ◽  
Neutron Diffraction Study ◽  
Ammonium Halides

scholarly journals Using applied pressure to guide materials design: a neutron diffraction study of La2NiO4+δ and Pr2NiO4+δ

2020 ◽  
Vol 49 (30) ◽  
pp. 10631-10637
Author(s):  
Craig L. Bull ◽  
Christopher J. Ridley ◽  
Helen Y. Playford
Keyword(s):  
High Pressure ◽  
Neutron Diffraction ◽  
Diffraction Study ◽  
Structural Changes ◽  
Applied Pressure ◽  
Materials Design ◽  
Neutron Diffraction Study

High-pressure structural changes being used as a guide to materials design.

Neutron diffraction study of the structural changes in the antifluorite crystals Rb2PtI6, (NH4)2PtBr6, and (NH4)2PtI6

1981 ◽  
Vol 59 (3) ◽  
pp. 449-456 ◽  
Author(s):  
Mark Sutton ◽  
Robin L. Armstrong ◽  
Brian M. Powell ◽  
William J. L. Buyers
Keyword(s):  
Phase Transitions ◽  
Neutron Diffraction ◽  
Diffraction Study ◽  
Structural Changes ◽  
Profile Analysis ◽  
Structural Phase ◽  
Neutron Diffraction Study ◽  
Tetragonal Distortion ◽  
Structural Phase Transitions

A neutron diffraction study of the structural phase transitions in Rb2PtI6, (NH4)2PtBr6, and (NH4)2PtI6 is presented. Cubic antifluorites studied to date exhibit transitions involving ferro- or antiferro-rotations of the halide octahedra with little or no tetragonal distortions. In this study we show that tetragonal distortions also occur in the antifluorites with or without accompanying rotations. Profile analysis reveals that below 65 K the Rb2PtI6 structure and below 50 K the (NH4)2PtBr6 structure become tetragonal with no evidence for rotation of the octahedra. Further, the 258 K transition in (NH4)2PtI6 is antiferro-rotative, with octahedra in successive (001) planes rotated in opposite senses, accompanied by a tetragonal distortion; the transition at 100 K involves a further ferro-rotation.

Sign in / Sign up

Export Citation Format

Share Document