Atomic ordering in the hcp cobalt hydrides and deuteridesстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Cobalt hydrides and deuterides with the hcp metal lattice and H(D)-to-metal atomic ratios 0.18 less than or equal to x less than or equal to 0.5 were prepared under high pressures of hydrogen or deuterium, respectively, and studied by neutron diffraction in a metastable state at 120 K and ambient pressure. A profile analysis of the spectra showed that in all samples the hydrogen and deuterium atoms occupy octahedral interstitial sites. In the samples with x less than or equal to 0.26, the hydrogen and deuterium atoms are randomly distributed over these sites. In the samples with x greater than or equal to 0.34, they form layered superstructures, occupying every third octahedral base layer at x = 0.34 and every second layer at x = 0.38 and 0.5.