Crystal structures and electrical properties of the compounds DyNiSi₃, Dy₃Ni₆Si₂, and DyNiSi

Chem. Met. Alloys 7 (2014) 194-201

https://doi.org/10.30970/cma7.0311

Oksana BARDIN, Bohdana BELAN, Svitlana PUKAS, Bohdan KUZHEL’, Yaroslav TOKAYCHUK, Mykola MANYAKO, Roman GLADYSHEVSKII

Crystal structure determinations based on X-ray powder diffraction data were performed for three ternary silicides in the Dy–Ni–Si system. The structures of DyNiSi₃, Dy₃Ni₆Si₂, and DyNiSi belong to the structure types SmNiGe₃ (Pearson symbol oS20, space group Cmmm, a = 3.9225(3), b = 20.955(1), c = 3.9465(3) Å), Ce₃Ni₆Si₂ (cI44, Im-3m, a = 8.7640(5) Å), and TiNiSi (oP12, Pnma, a = 6.8625(6), b = 4.1568(5), c = 7.1686(6) Å), respectively. Electrical resistivity measurements confirmed metal behavior and suggested magnetic phase transitions at low temperature.

Projection of the structure of the compound DyNiSi₃ along [001] and coordination polyhedra of the different sites.

Keywords

Dysprosium / Nickel / Silicon / X-ray diffraction / Crystal structure / Electrical properties