Thermal Expansion and Phase Transitions in Na3H(SO4)2 Sulfate in the Low-Temperature Range

N. V. Dmitrieva, R. S. Bubnova, S. K. Filatov, A. P. Shablinskii, M. G. Krzhizhanovskaya

Research output

Abstract

The thermal behavior of Na3H(SO4)2 is studied in the temperature range –180..220°C in a pre-vacuum. At 180°C, the compound decomposed into a mixture of phases: Na2SO4 (Cmcm), Na2SO4 (P63/mmc), Na2SO4 (Fddd), and Na2S2O7. The maximal thermal expansion was observed near the α33 axis. The anisotropy of thermal expansion sharply decreased together with the increase in temperature.

Original languageEnglish
Pages (from-to)395-397
JournalGlass Physics and Chemistry
Volume45
Issue number5
Early online date18 Oct 2019
DOIs
Publication statusPublished - 2019

Fingerprint

Sulfates
Thermal expansion
thermal expansion
sulfates
Phase transitions
Anisotropy
Vacuum
Temperature
vacuum
anisotropy
temperature
Hot Temperature

Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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abstract = "The thermal behavior of Na3H(SO4)2 is studied in the temperature range –180..220°C in a pre-vacuum. At 180°C, the compound decomposed into a mixture of phases: Na2SO4 (Cmcm), Na2SO4 (P63/mmc), Na2SO4 (Fddd), and Na2S2O7. The maximal thermal expansion was observed near the α33 axis. The anisotropy of thermal expansion sharply decreased together with the increase in temperature.",
keywords = "high temperature X-ray diffraction, phase transitions, sulfates, thermal expansion",
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T1 - Thermal Expansion and Phase Transitions in Na3H(SO4)2 Sulfate in the Low-Temperature Range

AU - Dmitrieva, N. V.

AU - Bubnova, R. S.

AU - Filatov, S. K.

AU - Shablinskii, A. P.

AU - Krzhizhanovskaya, M. G.

PY - 2019

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AB - The thermal behavior of Na3H(SO4)2 is studied in the temperature range –180..220°C in a pre-vacuum. At 180°C, the compound decomposed into a mixture of phases: Na2SO4 (Cmcm), Na2SO4 (P63/mmc), Na2SO4 (Fddd), and Na2S2O7. The maximal thermal expansion was observed near the α33 axis. The anisotropy of thermal expansion sharply decreased together with the increase in temperature.

KW - high temperature X-ray diffraction

KW - phase transitions

KW - sulfates

KW - thermal expansion

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JO - Glass Physics and Chemistry

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