New quaternary alumosilicides with Y3NiAl3Ge2-type structures
Chem.
Met. Alloys 13 (2020)
65-69
https://doi.org/10.30970/cma13.0407
Nataliya SEMUSO, Yuliya
PLYATSKO, Svitlana PUKAS, Roman GLADYSHEVSKII
Eight rare-earth
nickel alumosilicides R3NiAl3Si2 (R = Y, Gd, Tb, Dy, Ho, Er, Tm, Lu) were
synthesized by arc melting and their crystal structures were studied by X-ray
powder diffraction. They are isotypic to Y3NiAl3Ge2,
Pearson symbol hP9, space group P-62m.
The hexagonal structure type Y3NiAl3Ge2 (Z
= 1) is a quaternary variant of the binary type Fe2P (Z = 3)
and the ternary types β1-K2UF6, Lu3CoGa5, Zr3Cu4Si2, and ZrNiAl. It belongs to a family of structures with trigonal
prismatic coordination of the small atoms (Ni and Ge).
The structure type Y3NiAl3Ge2.
Keywords
Quaternary alumosilicide / X-ray powder diffraction /