Email this article Thermal Expansion and Phase Transitions in Na3H(SO4)2 Sulfate in the Low-Temperature Range
- Authors: Dmitrieva N.V.1, Bubnova R.S.1,2, Filatov S.K.1, Shablinskii A.P.1,2, Krzhizhanovskaya M.G.2
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Affiliations:
- Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences
- St. Petersburg State University
- Issue: Vol 45, No 5 (2019)
- Pages: 395-397
- Section: Short Communications
- URL: https://journals.rcsi.science/1087-6596/article/view/217373
- DOI: https://doi.org/10.1134/S1087659619050043
- ID: 217373
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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.
About the authors
N. V. Dmitrieva
Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences
Email: rimma_bubnova@mail.ru
Russian Federation, St. Petersburg, 199034
R. S. Bubnova
Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences; St. Petersburg State University
Author for correspondence.
Email: rimma_bubnova@mail.ru
Russian Federation, St. Petersburg, 199034; St. Petersburg, 199034
S. K. Filatov
Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences
Email: rimma_bubnova@mail.ru
Russian Federation, St. Petersburg, 199034
A. P. Shablinskii
Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences; St. Petersburg State University
Email: rimma_bubnova@mail.ru
Russian Federation, St. Petersburg, 199034; St. Petersburg, 199034
M. G. Krzhizhanovskaya
St. Petersburg State University
Email: rimma_bubnova@mail.ru
Russian Federation, St. Petersburg, 199034
