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Studies of ionic conductivity and structural phase transitions of Na3H(SO4)2 crystal |
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| Authors: | R H Chen Ren-June Wang T Fukami C S Shern |
| Institution: | a Department of Physics, National Taiwan Normal University, Taipei, 117, Taiwan b Department of Physics and Earth Sciences, College of Science, University of the Ryukyus, Okinawa 903-O1, Japan |
| Abstract: | The complex electrical impedance of Na3H(SO4)2 along the bm-axis has been measured from 25°C to 316°C in the frequency range 4 kHz–40 MHz. The temperature dependence of the electrical conductivity shows remarkable changes in the temperature range 160°C–260°C. The sample crystal becomes a fast ionic conductor above 260°C. The conduction mechanisms of proton and sodium ions in the different phases are analyzed in detail with respect to the structural features of the sample crystal. |
| Keywords: | Na3H(SO4)2 Ionic conductivity Structural phase transition |
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