Crystal chemical peculiarities of the intermetallic compound Pr(Ni0.2Al0.3Ge0.5)1.8

TitleCrystal chemical peculiarities of the intermetallic compound Pr(Ni0.2Al0.3Ge0.5)1.8
Publication TypeJournal Article
Year of Publication2017
AuthorsMuts, NM, Akselrud, LG, Gladyshevskii, RE
Abbreviated Key TitleDopov. Nac. akad. nauk Ukr.
DOI10.15407/dopovidi2017.11.067
Issue11
SectionChemistry
Pagination67-75
Date Published11/2017
LanguageUkrainian
Abstract

The crystal structure of the Pr(Ni0.2Al0.3Ge0.5)1.8 compound was refined based on X-ray single-crystal diffraction data: modulated structure (basic structure type AlB2) superspace group PA2mm (p00,0q0)m0m with modulation wave vectors p = 0.1540(1), q = 0.3384(1), a = 4.221(2) Å, b = 4.255(2) Å, c = 7.370(3) Å. The structural modulations are induced by the ordering of different sorts of atoms; the modulations of the substitution and displacement of atoms from the ideal positions were observed; the ordering of small-size atoms has own symmetry, which does not correspond to the symmetry of the parent AlB2-type structure.
Keywordscrystal structure, germanide, X-ray diffraction
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