Synthesis and crystal
structures of the new indides Dy5Pd2In
and Y5Pd2In
Chem.
Met. Alloys 9 (2016)
21-26
https://doi.org/10.30970/cma9.0317
B. BELAN, L. SOJKA, M. DEMCHYNA, M. MANYAKO, Ya. KALYCHAK
The new ternary indides
Dy5Pd2In and Y5Pd2In were prepared
by arc-melting of compact metals under an argon atmosphere with subsequent
annealing at 870 K for 720 h. The crystal structure of Dy5Pd2In
was determined from X-ray single crystal data: Mo5SiB2
structure type, space group I4/mcm, Pearson symbol tI32, Z = 4, a = 7.8490(11), c = 13.492(3) Å, R1 = 0.0399,
wR2 = 0.0637, for 201
independent reflections with I > 2σ(I)
and 16 variables. The crystal structure of the isotypic
compound Y5Pd2In (refined composition Y4.69(2)Pd2In1.31(2),
a = 7.798(1), c = 13.598(2) Å) with statistical distribution of part of the
yttrium and indium atoms was investigated using X-ray powder diffraction. All
the atoms in the title compounds have relatively low coordination numbers: 14
and 16 for dysprosium, 9 for palladium, and 10 for indium, similarly to other intermetallic compounds with high rare-earth content. No
strong bonding was observed in the structures.
Unit cell of the Dy5Pd2In
compound, slabs of Al2Cu and U3Si2
and coordination polyhedra of the atoms.
Keywords
Dysprosium
/ Palladium / Indium / Intermetallic compounds /
Crystal structure / X-ray diffraction