Crystal structure
of Zr5AlGe3
Chem.
Met. Alloys 12 (2019)
39-43
https://doi.org/10.30970/cma12.0393
Danylo MARYSKEVYCH, Yaroslav TOKAYCHUK, Yuriy
PROTS, Lev AKSELRUD, Roman GLADYSHEVSKII
The new ternary intermetallic
compound Zr5AlGe3 was synthesized and its crystal
structure was determined by X-ray single-crystal diffraction (structure type Hf5CuSn3, Pearson
symbol hP18, space
group P63/mcm, a = 8.104(3),
c = 5.654(2) Å, Z = 2). The structure type Hf5CuSn3 is a
ternary variant of the structure type Ti5Ga4 and a filled-up variant of the Mn5Si3 type.
ZrGe6 and AlZr6 octahedra
are connected by common faces and form 1D-rods along the crystallographic
direction [001], the former sharing edges to build up a 3D‑framework with
channels hosting the latter. At 600°C no solid solution was observed between
the Mn5Si3‑type
binary compound Zr5Ge3 and the ternary compound Zr5AlGe3.
3D-framework of Zr-centered
Ge6 octahedra with Al-centered Zr6
octahedra in channels in the structure of Zr5AlGe3.
Keywords
Zirconium / Aluminum / Germanium /
X-ray single-crystal diffraction / Crystal structure