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Structure of Hydride Phases Based on Intermetallic Compounds ZrMoV and ZrMo1.5V0.5 of С15 Laves Phases

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Abstract

Hydride phases have been synthesized based on ZrMoV and ZrMo1.5V0.5 pseudobinary intermetallic compounds with a cubic structure of С15 Laves phases (sp. gr. Fd\(\bar {3}\)m (no. 227), Z = 8). The ZrMoVН3.3 and ZrMo1.5V0.5Н3.5 hydride phases are formed during hydrogen absorption. The structures of synthesized hydrides have been investigated by X-ray diffraction (XRD) and neutron diffraction analyses. It is established that the hydrogen atomic ordering in the cubic lattice of ZrMoV and ZrMo1.5V0.5 leads to the formation of a superstructure with a tetragonal lattice (sp. gr. I41/a (no. 88), Z = 4). In contrast to the hydride in ZrMoV-based deuteride, a partially ordered superstructure (sp. gr. I41/amd (no. 141), Z = 4) is formed. The positional parameters of the metal and hydrogen atoms are determined by neutron diffraction analysis.

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Funding

This study was supported by the Russian Scientific Foundation, grant no. 16-12-10065.

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Authors and Affiliations

  1. Moscow State University, 119991, Moscow, Russia

    S. A. Lushnikov, L. A. Kachalova & V. N. Verbetsky

  2. National Research Centre “Kurchatov Institute”, 123182, Moscow, Russia

    S. S. Agafonov

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  1. S. A. Lushnikov
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  2. L. A. Kachalova
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  3. V. N. Verbetsky
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  4. S. S. Agafonov
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Correspondence to S. A. Lushnikov.

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Translated by Yu. Sin’kov

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Lushnikov, S.A., Kachalova, L.A., Verbetsky, V.N. et al. Structure of Hydride Phases Based on Intermetallic Compounds ZrMoV and ZrMo1.5V0.5 of С15 Laves Phases. Crystallogr. Rep. 65, 433–435 (2020). https://doi.org/10.1134/S1063774520030207

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  • DOI: https://doi.org/10.1134/S1063774520030207

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