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