Syntheses, structures, and characterization of the two-dimensional tellurides CsCu2MTe4 (M = Nb, Ta)

Jason A. Cody*, Eric J. Wu, Chi M. Cheung, James A Ibers

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The new compounds CsCu2MTe4 (M = Nb, Ta) have been synthesized at 900°C through the reaction of Cu and Nb or Ta with a Cs2Te3/Te melt as a reactive flux. Single-crystal X-ray diffraction measurements show that both compounds crystallize in the space group Pn21a of the orthorhombic system with four formula units in cells of dimensions a = 8.198(2) Å, b = 5.988(2) Å, c = 20.527(6) Å, V = 1007.7(6) Å3 at 113 K for M = Nb, and a = 8.217(5) Å, b = 5.992(5) Å, c = 20.562(14) Å, V = 1012(1) Å3 at 113 K for M = Ta. The two compounds are isostructural. The structure of CsCu2NbTe4 comprises infinite, two-dimensional layers of Cu-and Nb-centered tetrahedra; Cs+ cations separate the layers. Each Cs+ cation is coordinated by nine Te atoms at the corners of a highly distorted tricapped trigonal prism. Both phases are highly resistive.

Original languageEnglish (US)
Pages (from-to)225-229
Number of pages5
JournalJournal of Solid State Chemistry
Volume121
Issue number1
DOIs
StatePublished - Jan 5 1996

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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