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Pyrbelectric, dielectric and thermal properties of LiRbS (SO4)3 -1. 5H2SO4 were studied in the temperature range from 100 to 400 K. At 137 K marked anomalous changes in pyroelectric and thermal properties were observed, Below 137 K ferroelastic domain structure was found to appear.
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Wołejko et al. (1988) studied this question.
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