The new monoclinic structure
type Gd4ReGe8
Chem.
Met. Alloys 8 (2015) 55-62
https://doi.org/10.30970/cma8.0312
Vitaliia MYKHALICHKO, Roksolana KOZAK, Roman GLADYSHEVSKII
A new monoclinic structure type of intermetallic compounds, Gd4ReGe8 (mP64-12,
P21/ñ, a
= 5.8106(7), b = 16.060(2), c = 12.852(2) Å,
β = 115.379(9)°, R = 0.0405,
Rw = 0.0866), was identified on the
basis of X-ray single-crystal diffraction data. The structure of Gd4ReGe8
is a monoclinic derivative of the CeNiSi2 type, formed as a result
of partial ordering of d-element vacancies.
The structure, which contains four partly occupied Re sites, is closely related
to the Tb4FeGe8 type, where only two partly occupied Fe
sites were refined.
Packing of Gd-centered
polyhedra in the structure of Gd4ReGe8
(small red circles: Ge atoms, medium green circles:
Re atoms, large yellow circles: Gd atoms).
Keywords
Gadolinium / Rhenium / Germanium / Bärnighausen formalism / X-ray diffraction