Abstract
The stability region of (Na2–3xYx°2x)[(SO4)1–y(CO3)y]solid solutions with the crystal structure of Na2SO4 I, was determined as a function of temperature and composition. The high temperature modification can be cooled metastably to room temperature either in its original hexagonal form or in a distorted monoclinic variation. The solid solutions are good ionic conductors in which the Na± conductivity increases with the yttrium- and decreases with the carbonate content. The speed of the polymorphic transitions and the ionic conductivity are correlated.
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References
B. N. Mehrotra, Ph. D. Thesis, Technische Hochschule Aachen, Germany, 1973
H. H. Höfer, Ph. D. Thesis, Technische Hochschule Aachen, Germany, 1979
H. H. Höfer, W. Eysel and U. v. Alpen Electrochemistry of Na2SO4 I Solid Solutions with Aliovalent Cation Substitution. Journal of Solid State Chemistry, in press
W. Weppner, Max Planck Institut für Festkörper — forschung, Stuttgart, Germany (Private Communication)
W. Eysel, Proc. Third ICTA Davos 1971, Vol. II pp. 179–192
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© 1980 Springer Basel AG
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Schubert, H., Eysel, W. (1980). Crystal Chemistry and Cation Conductivity in Na2SO4-Y2(SO4)3-Na2CO3 Solid Solutions. In: Hemminger, W. (eds) Thermal Analysis. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-6736-8_13
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DOI: https://doi.org/10.1007/978-3-0348-6736-8_13
Publisher Name: Birkhäuser, Basel
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