Incoherent inelastic and quasielastic neutron scattering with simultaneous neutron diffraction control of phase transitions in [Mg(NH<inf>3</inf>)<inf>6</inf>](NO<inf>3</inf>)<inf>2</inf>

Belushkin, A.; Janik, J.A.; Janik, J.M.; Janik, B.; Migdał-Mikuli, A.; Mikuli, E.; Natkaniec, I.; Wąsicki, Jan

doi:10.1016/0378-4363(85)90005-1

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Incoherent inelastic and quasielastic neutron scattering with simultaneous neutron diffraction control of phase transitions in [Mg(NH3)6](NO3)2

Authors:

A. Belushkin,
J.A. Janik,
J.M. Janik,
B. Janik,
A. Migdał-Mikuli,
E. Mikuli,
I. Natkaniec,
Jan Wąsicki

Abstract

Neutron diffraction measurements carried out with [Mg(NH₃)₆](NO₃)₂ powder showed the existence of three solid phases. Phase I is fcc (Fm3m), phase II is primitive cubic (Pa3) and phase III is perhaps orthorhombic. The phase II → phase III transition occurs at about 110 K on cooling. When heating phase III above this temperature, one obtains a metastable phase III which slowly transforms into phase II. INS measurements showed a group of NH₃-torsion peaks both in phase II and phase III instead of a single peak. This indicates a lack of NH₃ equivalency. QNS measurements showed that NH₃ groups are quickly reorienting in phase I and II. In phases I and II. In phase III four out of the six NH₃ groups reorient at a slower rate (outside of the neutron "detection window") but two groups perform still a fast reorientation. © 1985.

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Record ID: UAM822a9f7ecac14fb99638d5508a94563f
Author: A. Belushkin A. Belushkin,, External affiliation of publication: Joint Institute for Nuclear Research, Dubna
J.A. Janik J.A. Janik,, External affiliation of publication: Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
J.M. Janik J.M. Janik,, External affiliation of publication: Uniwersytet Jagiellonski w Krakowie
B. Janik B. Janik,, External affiliation of publication: Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
A. Migdał-Mikuli A. Migdał-Mikuli,, External affiliation of publication: Uniwersytet Jagiellonski w Krakowie
E. Mikuli E. Mikuli,, External affiliation of publication: Uniwersytet Jagiellonski w Krakowie
I. Natkaniec I. Natkaniec,, External affiliation of publication: Joint Institute for Nuclear Research, Dubna
Jan Wąsicki Jan Wąsicki,,
Journal series: Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics, ISSN 0378-4363
Issue year: 1985
Vol: 128
Pages: 292-296
ASJC Classification: 2200 General Engineering
DOI: DOI:10.1016/0378-4363(85)90005-1 opening in a new tab
Language: en English
Score (nominal): 0
Score source: journalList
Publication indicators: Scopus Citations = 5

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Uniform Resource Identifier: https://researchportal.amu.edu.pl/info/article/UAM822a9f7ecac14fb99638d5508a94563f/

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