New
ternary phases from the R–Au–Ga systems (R = Gd-Tm)
Chem.
Met. Alloys 7
(2014) 42-55
https://doi.org/10.30970/cma7.0268
Twenty rare-earth gold gallides, RAu3Ga7 (ScRh3Si7-type, space group R-3c, Z = 6, hR66), RAu3±xGa3±x (YCd6-type, space group Im-3, Z = 24, cI68), RAu1+xGa2-x
(MgCuAl2-type, space group Cmcm, Z = 4, oS16) (R
= Gd-Tm) and R14Au34+xGa17-x (Gd14Ag51-type, space group P6/m,
Z = 1, hP65) (R = Er, Tm), were synthesized by
arc-melting, followed by annealing at 400-600ºC. Six phases RAu1+xGa3-x
(BaAl4-type, space group I4/mmm,
Z = 2, tI10) (R = Gd) and R3Au3+xGa8-x (La3Al11-type, space group Immm, Z = 2, oI26) (R = Tb-Tm) were prepared by the flux
method. Their crystal structures were studied by X-ray powder or single crystal
diffraction. Structural
peculiarities, coordination and interaction of the atoms in the investigated
compounds are briefly discussed.
The RAu3+xGa3-x structure.
Keywords
Rare-earth intermetallics / Ternary gallides
/ Crystal growth / Single crystal / X-ray diffraction / Crystal
structure