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
Eight new rare earth gold aluminides R3AuxAl11–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 R3AuxAl11–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