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Lattice anisotropy in uranium ternary compounds: UTX

Publication: Research - peer-reviewJournal article


S. Maskova, A.M. Adamska, L. Havela, NTH Kim-Ngan, J. Przewoznik, S. Danis, K. Kothapalli, A.V. Kolomiets, S. Heathman, H. Nakotte, Heloisa N. Bordallo

Several U-based intermetallic compounds (UCoGe, UNiGe with the TiNiSi structure type and UNiAl with the ZrNiAl structure type) and their hydrides were studied from the point of view of compressibility and thermal expansion. Confronted with existing data for the compounds with the ZrNiAl structure type a common pattern emerges. The direction of the U-U bonds with participation of the 5f states is distinctly the "soft" crystallographic direction, exhibiting also the highest coefficient of linear thermal expansion. The finding leads to an apparent paradox: the closer the U atoms are together in a particular direction the better they can be additionally compressed together by applied hydrostatic pressure.
Original languageEnglish
JournalJournal of Alloys and Compounds
Pages (from-to)130-135
StatePublished - 5 May 2012

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