On Phase Transitions in LiNH4SO4

A Landau‐type thermodynamie theory describing the sequence of phase transitions in lithium ammonium sulphate at atmospheric pressure is developed. The form of the phase diagram is derived and compared with that constructed on the basis of published experimental data. The existence of a new monoclini...

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Veröffentlicht in:Physica status solidi. B. Basic research 1984-12, Vol.126 (2), p.459-466
Hauptverfasser: Torgashev, V. I., Dvořák, V., Smutný, F.
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container_issue 2
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container_title Physica status solidi. B. Basic research
container_volume 126
creator Torgashev, V. I.
Dvořák, V.
Smutný, F.
description A Landau‐type thermodynamie theory describing the sequence of phase transitions in lithium ammonium sulphate at atmospheric pressure is developed. The form of the phase diagram is derived and compared with that constructed on the basis of published experimental data. The existence of a new monoclinic high pressure phase is proposed. Formulae for permittivity are presented and compared with available experimental data. Soft mode features of Raman and infra‐red spectra are briefly discussed. [Russian Text Ignored].
doi_str_mv 10.1002/pssb.2221260204
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1521-3951
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source Wiley Online Library Journals Frontfile Complete
subjects Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
Crystallographic aspects of phase transformations
pressure effects
Exact sciences and technology
Physics
Structure of solids and liquids
crystallography
title On Phase Transitions in LiNH4SO4
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