Synthesis and crystal
structure of LaNi5In and Sm2Ni2-xIn (x = 0.20)
Chem.
Met. Alloys 4
(2011) 113-118
https://doi.org/10.30970/cma4.0176
Mykola PUSTOVOYCHENKO, Volodymyr PAVLYUK, Yaroslav KALYCHAK
LaNi5In and Sm2Ni2-xIn
(x = 0.20) were obtained by
arc-melting of compact metals under argon. Their crystal structures were
refined from X-ray single crystal data: LaNi5In crystallizes in the
CeNi5Sn structure type, space group P63/mmc, Z = 4, a = 4.9570(7), c =
19.969(4) Å; Sm2Ni2‑xIn (x = 0.20) crystallizes in the Mo2FeB2
structure type, space group P4/mbm, Z =
2, a = 7.523(4), c = 3.790(6) Å. The structure of LaNi5In can be
decomposed into slabs from CaCu5 and two hypothetical compounds
“LaNi2In” and “Ni3In” in the ratio 2:4:8. The compound Sm2Ni2‑xIn
is constructed from trigonal (AlB2 type)
and tetragonal (CsCl type) prisms in the ratio 2:2.
Projection of the structure of Sm2Ni1.8In
onto the [100][010] plane and coordination polyhedra of the different atom sites.
Keywords
Intermetallic compound / Crystal structure /
Lanthanum / Samarium / Nickel / Indium