Crystal structure and magnetic properties of PrNi9Si4 and NdNi9Si4
Chem.
Met. Alloys 7 (2014) 68-73
https://doi.org/10.30970/cma7.0293
Bohdana BELAN, Mykola MANYAKO, Svitlana PUKAS, Yaroslav TOKAYCHUK, Roman GLADYSHEVSKII, Dariusz KACZOROWSKI
Two rare-earth nickel silicides,
PrNi9Si4 and NdNi9Si4,
were synthesized. Their crystal structures were refined from X-ray powder
diffraction data: structure type CeNi8.5Si4.5,
Pearson symbol tI56, space group I4/mcm, lattice parameters a = 7.8377(12),
c = 11.4861(17) Å for the Pr-containing compound, and
a = 7.836(2), c = 11.457(3) Å for the Nd-containing
compound. Both structures have a fully ordered distribution of atoms. The two
compounds are Curie-Weiss paramagnets due to magnetic moments carried on the
rare-earth atoms, with no hint at any magnetic long-range ordering down to 1.72 K.
Unit cell of the RNi9Si4 (R = Pr,
Nd) compounds
Keywords
Praseodymium / Neodymium / Nickel /
Silicon / Intermetallic
compounds / X-ray diffraction
/ Crystal structure / Magnetic properties