Crystal structure of the Tl4GeSe4
ternary compound
Chem.
Met. Alloys 2
(2009) 10-14
https://doi.org/10.30970/cma2.0079
O.S. GLUKH,
M.Yu. SABOV, I.E. BARCHIJ, V.V. PAVLYUK,
B. MARCINIAK
The crystal structure of the Tl4GeSe4
compound was determined by X-ray single crystal diffraction. The title compound
crystallizes with the Tl4SiSe4 structure type (space group C2/c). The Tl+
cations are coordinated by four separate [GeSe4]4– anions,
whereas the [GeSe4]4– anion is
surrounded by nine Tl+ cations. Strengthening of the cation-anion interactions was observed with respect to the Si-compound.
a)
b)
c)
Crystal structure of Tl4GeSe4 projected on the xz plane. Packing
of [GeSe4] tetrahedron and Tl+
split nets (a), surrounding of the Tl+
ions by GeSe4 tetrahedra (b), and
surrounding of the GeSe4 tetrahedra by Tl+ cations (c).
Keywords
Intermetallics / Crystal structure / X-ray
diffraction / Thallium
/ Germanium / Selenium