The crystal structure determinations of rubidium hexabromoantimonate(III,V) and tetramethylammonium nonabromodiantimonate(III) dibromine and a highly efficient white radiation neutron diffraction technique

An experimental neutron diffraction technique was used to measure residual strains that developed in multiphase composite materials during postfabrication cooling as a result of thermal expansion mismatch or volume expansion due to change in crystal structure. The reinforcement geometries that were studied include unidirectional fibers, randomly oriented single crystal whiskers, and equiaxed particles. Both metal and ceramic matrices and reinforcements were considered. In some cases, the measured data compared fairly well with predictions based on simple elastic models. In other cases, either creep was shown to relax the residual strains during cooling, or the interpretation of the measured data contained uncertainties due to texture in the samples or lack of a clearly defined crystal structure for the reinforcement phase.

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A Study of the Cubic Phase of Solid Acetylene-d2

Zeitschrift für Naturforschung A ◽

10.1515/zna-1975-0818 ◽

1975 ◽

Vol 30 (8) ◽

pp. 1028-1031

Author(s):

Harri K. Koski

Keyword(s):

Crystal Structure ◽

Neutron Diffraction ◽

Thermal Neutron ◽

Powder Pattern ◽

Cubic Phase ◽

Narrow Temperature Range ◽

Temperature Range ◽

Theoretical Pattern ◽

Neutron Diffraction Technique ◽

High Phase

Abstract The powder pattern of crystalline cubic deuterated acetylene recorded by thermal neutron diffraction technique and the Pa3 crystal structure assigned to the high phase of C2H2 are com-pared. The observations are not in disagreement with the theoretical pattern. Values for the lattice parameters in a narrow temperature range are given.

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A highly efficient neutron diffraction technique: use of white radiation

Acta Crystallographica Section A ◽

10.1107/s0567739472000658 ◽

1972 ◽

Vol 28 (3) ◽

pp. 236-245 ◽

Cited By ~ 2

Author(s):

C. R. Hubbard ◽

C. O. Quicksall ◽

R. A. Jacobson

Keyword(s):

Neutron Diffraction ◽

Highly Efficient ◽

Neutron Diffraction Technique

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Recent crystal structure determinations by neutron diffraction at Oak Ridge

Journal de Physique ◽

10.1051/jphys:01964002505046900 ◽

1964 ◽

Vol 25 (5) ◽

pp. 469-473 ◽

Cited By ~ 9

Author(s):

George M. Brown ◽

Henri A. Levy

Keyword(s):

Crystal Structure ◽

Neutron Diffraction ◽

Oak Ridge ◽

Structure Determinations

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Crystal structure of monoclinic hafnia (HfO2) revisited with synchrotron X-ray, neutron diffraction and first-principles calculations

Acta Crystallographica Section C Structural Chemistry ◽

10.1107/s2053229620013960 ◽

2020 ◽

Vol 76 (11) ◽

pp. 1034-1042

Author(s):

Santanu Pathak ◽

Parnika Das ◽

Tilak Das ◽

Guruprasad Mandal ◽

Boby Joseph ◽

...

Keyword(s):

Crystal Structure ◽

Neutron Diffraction ◽

Density Functional ◽

Local Density ◽

Structural Parameters ◽

First Principles Calculations ◽

Electronic Band ◽

X Ray ◽

Electronic Band Gap ◽

Neutron Diffraction Technique

A study on the crystal structure of monoclinic HfO2 has been performed using synchrotron X-ray and neutron diffraction data separately, as well as a combination of both. The precision of the structural parameters increases significantly due to application of the neutron diffraction technique. The experimental oxygen positions in HfO2, derived precisely, are visualized only by semi-local density functional calculations in terms of the calculated electronic band gap, but are not captured as accurately by using hybrid functionals.

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