The compounds Gd3Cu2Te7 and U2Cu0.78Te6 have been synthesized by reactions of the elements at 1123 K in a KI flux. Gd3Cu2Te7 crystallizes in the orthorhombic space group Cmcm with four formula units in a cell of dimensions a=11.4994(8), b=19.170(1), and c=6.1251(4) Å at T=153 K. Gd3Cu2Te7 can be considered to consist of one-dimensional isolated Te chains and two-dimensional ∞2[Cu2Te5] layers separated by Gd atoms along the b axis. U2Cu0.78Te6 crystallizes in the monoclinic space group P21/m with one formula unit in a cell of dimensions a=6.100(1), b=4.2150(7), c=10.365(2) Å, and β=98.978(3)° at T=153 K. U2Cu0.78Te6 contains two-dimensional ∞2[UTe3] layers joined by Cu atoms along the c axis. In both structures the Gd and U atoms are coordinated to bicapped trigonal prisms of eight Te atoms, and the Cu atoms are coordinated to tetrahedra of four Te atoms. Both structures contain linear Te chains.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry