Crystal structures of the new intermetallics Ce3Pt5Al and Ce3Pt5Al2
Chem.
Met. Alloys 7 (2014) 15-19
https://doi.org/10.30970/cma7.0261
A. TURSINA, H. NOËL,
E. MURASHOVA, Y. MOROZOVA,
Y. SEROPEGIN
The
crystal structures of the ternary intermetallics Ce3Pt5Al and
Ce3Pt5Al2 have been determined from single crystal X-ray
diffraction data. Ce3Pt5Al
is a new representative of the Ce3Pd5Si-type of
structure: space group Imma,
a = 7.3767(4) Å, b = 13.1733(8) Å, c = 7.5884(4) Å, Pearson symbol oI36.
Ce3Pt5Al2
crystallizes in the triclinic space group P-1
with a = 5.689(2) Å, b = 8.432(3) Å, c = 8.7103(13) Å, α = 102.31(2)º, β = 97.89(2)º,
γ = 89.10(3)º
(Pearson symbol aP20) and represents
a novel structure type. In both structures, the coordination polyhedra are rather irregular. The structures of Ce3Pt5Al
and Ce3Pt5Al2 can be represented as packings of Ce-centered polyhedra.
Polyhedral representation of the structure of
Ce3Pt5Al2
Keywords
Cerium platinum aluminide / X-ray diffraction /
Crystal structure / Ce3Pt5Al
/ Ce3Pt5Al2