Confirmation of the crystal
structure of PrNi9Si4
Chem.
Met. Alloys 10 (2017)
40-44
https://doi.org/10.30970/cma10.0360
Bohdana BELAN, Svitlana PUKAS, Mykola MANYAKO, Anna GAGOR, Roman GLADYSHEVSKII
The crystal structure of PrNi9Si4
was refined on X-ray single-crystal diffraction data. It was confirmed that the
compound crystallizes in the tetragonal system, space group I4/mcm
(a = 7.8335(11), c = 11.466(2) Å, Z = 4;
R = 0.0284, wR = 0.0703
for 209 independent reflections and 25 variables). The structure belongs to the
structure type CeNi8.5Si4.5, but shows ordered
distribution of the atoms with the Si atoms occupying
exclusively one of the sites in Wyckoff position 16l.
Atom ordering in the structure of PrNi9Si4
compound compared with the models proposed for Pr0.693Co9Ge4
and CeNi8.5Si4.5.
Keywords
Praseodymium / Nickel / Silicon / X-ray single
crystal diffraction / Crystal structure