Crystal structure
refinements and magnetic behavior of U6Ni, UNi5, UNi2
and the substitution derivative UNi1.7Si0.3
Chem.
Met. Alloys 1
(2008) 54-57
https://doi.org/10.30970/cma1.0034
A. PERRICONE, H. NOËL
The crystal structures of the binaries
U6Ni, UNi2 and UNi5 have been refined for the
first time from single crystal data. U6Ni crystallizes in the
tetragonal system, U6Mn type, s.g. I4/mcm, with lattice parameters a = 10.3835(8) Å, c
= 5.1565(4) Å. The uranium atoms occupy 8h (U1) and 16k (U2)
Wyckoff positions, and the Ni atoms a 4a
position. UNi5
crystallizes in the cubic AuBe5 type, s.g. F-43m,
with a = 6.7958(6) Å and the
following atom site occupations: U in 4a,
Ni1 in 16e and Ni2 in 4c. UNi2 crystallizes in the
hexagonal MgZn2 type, s.g. P63/mmc, with a = 4.9701(4) Å, c
= 8.2527(8) Å. Uranium occupies a
Thermal variation of
the magnetization and of the reverse susceptibility under 5 kGauss for UNi2.
Keywords
Uranium compounds / Intermetallics / Crystal
structure / Magnetic properties