New quaternary alumogermanides with the structure type SmNiAl4Ge2 | Zendy

Mar’yana PETROVSKA | Zendy; Nastasia Klymentiy | Zendy; Svitlana PUKAS | Zendy; R. Gladyshevskii | Zendy

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New quaternary alumogermanides with the structure type SmNiAl4Ge2

Author(s) -

Mar’yana PETROVSKA,

Nastasia Klymentiy,

Svitlana PUKAS,

R. Gladyshevskii

Publication year - 2018

Publication title -

chemistry of metals and alloys

Language(s) - English

Resource type - Journals

eISSN - 1998-8087

pISSN - 1998-8079

DOI - 10.30970/cma11.0379

Subject(s) - crystallography , octahedron , crystal structure , atom (system on chip) , nickel , materials science , type (biology) , powder diffraction , group (periodic table) , diffraction , cube (algebra) , chemistry , metallurgy , physics , geometry , geology , mathematics , optics , paleontology , organic chemistry , computer science , embedded system

Six rare-earth nickel alumogermanides RNiAl4Ge2 (R = Gd, Tb, Dy, Ho, Tm, Lu) were synthesized by arc melting and their crystal structures were studied by X-ray powder diffraction. They are isotypic to SmNiAl4Ge2, Pearson symbol hR24, space group R-3m. The structures of the RNiAl4Ge2 compounds can be described as formed by two types of alternating slabs. The first type of slab is built up of cubes of composition Al8, every second cube being centered by a Ni atom, and the second one is formed by octahedra of composition Ge6, every second octahedron being centered by an R atom.

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