Thermal,dielectric, and electrical transport properties of some bivalent metal perrhenates |
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| Institution: | 1. Jiangsu Key Laboratory of E-waste Recycling, School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou, 213001, China;2. School of Chemistry and Chemical Engineering, Jiangsu University of Technology, Changzhou, 213001, China;1. Department of Chemistry, Moscow State University, Vorobievy Gory 1-3, Moscow, 119991, Russia;2. Department of Crystallography, Institute of Earth Sciences, St. Petersburg State University, University Emb. 7/9, St. Petersburg, 199034, Russia;3. Kola Science Center, Russian Acad. Sci., Fersmana str. 14, Apatity, Murmansk Region, 184209, Russia |
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| Abstract: | Thermal, dielectric, and electron transport properties of dihydrated and anhydrous perrhenates of strontium, barium, cadmium, and lead have been investigated. The DTA of anhydrousMReO4]2 (M =Sr, Ba, Cd) compounds exhibit three reversible phase transitions with considerable thermal hysterisis for the first phase transformation. A single reversible phase transition occurs for PbReO4]2. The parent phases of BaReO4]2, PbReO4]2, and CdReO4]2 behave as semiconductors at elevated temperatures. The dielectric constants measured for SrReO4]2 in the temperature range 30 to −160°C give a broad inflection between −40 and −70°C, which probably indicates a phase transition. |
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