Structure peculiarities of the
new ternary gallide Tm14Cu46Ga5
Chem.
Met. Alloys 4 (2011) 119-125
https://doi.org/10.30970/cma4.0192
Oleg MYKHALICHKO, Yaroslav TOKAYCHUK, Roman GLADYSHEVSKII
The crystal structure of the new ternary
compound Tm14Cu46Ga5 (hP74-9, P6/m, a =
11.573(3), c = 8.559(2) Å) has been refined based on X-ray single-crystal
diffraction data. It displays similarities with the binary structure types Ce14Cu51
and Gd14Ag51. In one of the monoatomic
layers perpendicular to [0 0 1], a disordered atom arrangement,
modeled by a half-occupied 6-fold site of Cu atoms and splitting of the Tm site
into two half-occupied 6-fold positions, was observed. The structure is
characterized by single Cu atoms, [Cu3] triangles, and [Cu3]
finite chains; the Ga atoms are arranged in isolated
[(Ga,Cu)6]
hexagons.
Cu-atom segments in the structure of Tm14Cu46Ga5.
Keywords
Gallide / Thulium / Copper / Single-crystal
X-ray diffraction / Crystal structure / Element substructure