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Exploration of the high temperature phase evolution of electrochemically modified Sc2(WO4)3 via potassium discharge

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Abstract

The activation of Sc2(WO4)3 via electrochemical discharge against potassium metal is investigated, as well as the subsequent thermal evolution of Sc2(WO4)3. On subsequent heating from 100 to 623 K the discharged electrode exhibits essentially the same thermal expansion as that of the pure powder. Between 673 and 973 K a trigonal K2WO4-type phase (P[3 with combining macron]m1) is formed. Variable-temperature X-ray diffraction data indicates that upon heating from 923 K–1023 K, this phase has a thermal expansion coefficient of −1.90(10) × 10−4 K−1.

Graphical abstract: Exploration of the high temperature phase evolution of electrochemically modified Sc2(WO4)3 via potassium discharge

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Publication details

The article was received on 12 Jun 2019, accepted on 09 Aug 2019 and first published on 09 Aug 2019


Article type: Research Article
DOI: 10.1039/C9QI00699K
Inorg. Chem. Front., 2019, Advance Article

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    Exploration of the high temperature phase evolution of electrochemically modified Sc2(WO4)3 via potassium discharge

    J. Liu, A. R. Haworth, K. E. Johnston, D. Goonetilleke and N. Sharma, Inorg. Chem. Front., 2019, Advance Article , DOI: 10.1039/C9QI00699K

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