On the crystal chemistry of new ternary rare earth gold aluminides

Chem. Met. Alloys 5 (2012) 23-32

https://doi.org/10.30970/cma5.0203

Yuriy VERBOVYTSKYY

Eight new rare earth gold aluminides R₃Au_xAl_11–x (R = Y, Gd, Ho, Er, and Tm), RAuAl₃ (R = Yb and Gd) and RAu₃Al₇ (R = Y) have been synthesized by arc-melting, followed by annealing at 600ºC. The crystal structures of the compounds were solved from powder X-ray diffraction data. The above mentioned intermetallics crystallize with four known structure types, La₃Al₁₁, BaAl₄, BaNiSn₃, and ScRh₃Si₇. Structural peculiarities, coordinations and interactions of the atoms in the investigated compounds are briefly discussed.

Projection of the R₃Au_xAl_11–x structure onto the YZ plane. White circles represent R atoms and grey filled circles M (Au and Al) atoms

Keywords

Rare earth intermetallics / Ternary aluminides / X-ray diffraction / Crystal structure