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  3. Potassium and thallium conductors with a trigonal structure in the M2MoO4–Cr2(MoO4)3–Hf(MoO4)2 (M = K, Tl) systems: Synthesis, structure, and ionic conductivity

Potassium and thallium conductors with a trigonal structure in the M2MoO4–Cr2(MoO4)3–Hf(MoO4)2 (M = K, Tl) systems: Synthesis, structure, and ionic conductivity

Описание

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1016/j.jallcom.2021.159828

Ключевые слова: conducting material, dsc, molybdates, phase diagram, potassium, synthesis, thallium

Аннотация: The triple molybdates M5CrHf(MoO4)6 (M = K, Tl) and TlCrHf0.5(MoO4)3 were found upon studying the corresponding ternary molybdate systems M2MoO4–Cr2(MoO4)3–Hf(MoO4)2 (M = K, Tl) in the subsolidus region using X-ray powder diffraction. The crystal structures of M5CrHf(MoO4)6 (M = K, Tl) and TlCrHf0.5(MoO4)3 are refined by Rietveld mПоказать полностьюethod. M5CrHf(MoO4)6 (M = K, Tl) crystallizes in space group R3¯c with unit cell parameters: a = b = 10.45548 (5), c = 37.24614 (3) Å, V = 3526.14 (4) Å3, Z = 6 for K5CrHf(MoO4)6 and a = b = 10.53406 (12), c = 37.6837 (5) Å, V = 3621.39 (9) Å3, Z = 6 for Tl5CrHf(MoO4)6. TlCrHf0.5(MoO4)3 crystallizes in space group R3¯ with unit cell parameters: a = b = 12.9710 (2), c = 11.7825 (2) Å, V = 1716.78 (6) Å3, Z = 6. The thermal stability and electrical conductivity of the new compounds were investigated. Electrical conductivity measurements gave high values for the triple molybdates M5CrHf(MoO4)6 (M = K, Tl) (σ = 5.22 × 10−4 S / cm for K5CrHf(MoO4)6, σ = 1.1 × 10−2 S / cm for Tl5CrHf(MoO4)6 at 773 K) and relatively low values for the triple molybdate TlCrHf0.5(MoO4)3 (σ = 4.42 × 10−6 S / cm at 773 K). © 2021

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Издание

Журнал: Journal of Alloys and Compounds

Выпуск журнала: Vol. 873

Номера страниц: 159828

ISSN журнала: 09258388

Издатель: Elsevier Ltd

Персоны

  • Grossman Victoria G. (RAS, SB, Baikal Inst Nat Management, Sakhyanovoy St 6, Ulan Ude 670047, Russia)
  • Molokeev Maxim S. (Acad Sci, Siberian Branch, Fed Res Ctr KSC, Kirensky Inst Phys, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia; Siberian Fed Univ, 82 Svobodniy Av, Krasnoyarsk 660041, Russia; Far Eastern State Transport Univ, Dept Phys, Serysheva Str 47, Khabarovsk 680021, Russia)
  • Bazarov Bair G. (RAS, SB, Baikal Inst Nat Management, Sakhyanovoy St 6, Ulan Ude 670047, Russia)
  • Bazarova Jibzema G. (RAS, SB, Baikal Inst Nat Management, Sakhyanovoy St 6, Ulan Ude 670047, Russia)

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