Structure of Hydride Phases Based on Intermetallic Compounds ZrMoV and ZrMo1.5V0.5 of С15 Laves Phasesстатья
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Дата последнего поиска статьи во внешних источниках: 17 июля 2020 г.
Авторы:Lushnikov S.A.,
Kachalova L.A.,
Verbetsky & S S Agafonov V.N.
Аннотация: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. Fd3¯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.