Skip to main content
The First Lanthanide Telluride-Bromide: La3Te4Br, a Valence Compound
Crystals (2011)
  • Markus Larres
  • Anja V. Mudring
  • Gerd Meyer

The first ternary lanthanide telluride-bromide La3Te4Br was obtained from a mixture of LaTe and LaBr3 (in the presence of iridium) in a sealed tantalum container at elevated temperatures. The crystal structure (orthorhombic, Pnma, a = 1634.3(2), b = 435.0(1), c = 1426.6(2) pm, Z = 4, R1 (I0 > 2s(I0)) = 0.0349) is built from dicapped trigonal prisms of tellurium and bromine atoms surrounding lanthanum in two different ways. The dicapped trigonal prisms are connected via common edges to a threedimensional structure, in the same fashion as is known for the binary U3Te5. La3Te4Br is a valence compound according to (La3+)3(Te2-)4(Br-) and one out of three lanthanide telluride-halides known to date.

  • Lanthanum,
  • Telluride-bromide,
  • Synthesis,
  • Crystal structure
Publication Date
Publisher Statement
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Citation Information
Markus Larres, Anja V. Mudring and Gerd Meyer. "The First Lanthanide Telluride-Bromide: La3Te4Br, a Valence Compound" Crystals Vol. 1 Iss. 1 (2011)
Available at: