Stoichiometry and topological features of triple molybdates ABC(MoO4)  with the heteropolyhedral open MT-frameworks: Synthesis, crystal structure of Rb5{Hf1.5Co0.5(MoO4)6}, and comparative crystal chemistry

Aksenov, Sergey M.; Pavlova, Erzhena T.; Popova, Nadezhda N.; Tsyrenova, Galina D.; Lazoryak, Bogdan I.

doi:10.1016/j.solidstatesciences.2024.107525

Solid State Sciences

2024

DOI: 10.1016/j.solidstatesciences.2024.107525

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Stoichiometry and topological features of triple molybdates ABC(MoO4) with the heteropolyhedral open MT-frameworks: Synthesis, crystal structure of Rb5{Hf1.5Co0.5(MoO4)6}, and comparative crystal chemistry

Sergey M. Aksenov,

Erzhena T. Pavlova,

Nadezhda N. Popova

et al.

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Cited by 2 publications

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Thermal expansion and ionic conductivity of K5A0.5Hf1.5(MoO4)6 (A = Sr, Pb)

Kovtunets,

Tushinova,

Spiridonova

et al. 2024

Solid State Sciences

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Thermal expansion and ionic conductivity of K5A0.5Hf1.5(MoO4)6 (A = Sr, Pb)

Kovtunets,

Tushinova,

Spiridonova

et al. 2024

Solid State Sciences

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Ternary molybdate Rb₅(Ag_1/3Hf_5/3)(MoO₄)₆: synthesis, structure, thermal expansion and ionic conductivity

Subanakov,

Tushinova,

Kovtunets

et al. 2024

Chim.Tech.Acta

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This study aims to characterize the properties of the ternary molybdate Rb5(Ag1/3Hf5/3)(MoO4)6, which was previously identified during phase equilibrium investigations in the Ag2MoO4–Rb2MoO4–Hf(MoO4)2 system. A ternary molybdate Rb5(Ag1/3Hf5/3)(MoO4)6 was obtained through a solid-state reaction. It was found that the compound crystallizes in the trigonal space group R c and melts at 596 °C with decomposition. Its structure was refined using the Rietveld method. The crystal structure consists of a mixed framework composed of isolated (Ag/Hf)O6 octahedra and MoO4 tetrahedra, interconnected through shared oxygen vertices. Large voids within the framework accommodate two types of rubidium atoms. Using the powder XRD data recorded over 30–400 °C, the principal components of the thermal expansion tensor were determined. Rb5(Ag1/3Hf5/3)(MoO4)6 can be classified as a material with high thermal expansion coefficient (αV = 36.7∙10–6 °С–1 at 400 °C). At elevated temperatures, the compound exhibited significant ionic conductivity, reaching 1.7·10−3 S/cm at 480 °C with an activation energy Еа = 0.8 eV with oxygen ions as the probable charge carriers. Energy barriers for one-, two-, and three-dimensional transport in the compound were theoretically evaluated using the softBV program and bond valence sum maps (BVS).

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Stoichiometry and topological features of triple molybdates ABC(MoO4) with the heteropolyhedral open MT-frameworks: Synthesis, crystal structure of Rb5{Hf1.5Co0.5(MoO4)6}, and comparative crystal chemistry

Cited by 2 publications

References 72 publications

Thermal expansion and ionic conductivity of K5A0.5Hf1.5(MoO4)6 (A = Sr, Pb)

Thermal expansion and ionic conductivity of K5A0.5Hf1.5(MoO4)6 (A = Sr, Pb)

Ternary molybdate Rb₅(Ag_1/3Hf_5/3)(MoO₄)₆: synthesis, structure, thermal expansion and ionic conductivity

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Stoichiometry and topological features of triple molybdates ABC(MoO4) with the heteropolyhedral open MT-frameworks: Synthesis, crystal structure of Rb5{Hf1.5Co0.5(MoO4)6}, and comparative crystal chemistry

Cited by 2 publications

References 72 publications

Thermal expansion and ionic conductivity of K5A0.5Hf1.5(MoO4)6 (A = Sr, Pb)

Thermal expansion and ionic conductivity of K5A0.5Hf1.5(MoO4)6 (A = Sr, Pb)

Ternary molybdate Rb5(Ag1/3Hf5/3)(MoO4)6: synthesis, structure, thermal expansion and ionic conductivity

Contact Info

Product

Resources

About

Ternary molybdate Rb₅(Ag_1/3Hf_5/3)(MoO₄)₆: synthesis, structure, thermal expansion and ionic conductivity