An investigation of the rare-earth telluride system BaLn2Te4 (Ln = Sm-Tm, Y): Syntheses, crystal structures, and magnetic properties

Amy A. Narducci*, Yuting Yang, Michelle A. Digman, Abe B. Sipes, James A. Ibers

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

17 Scopus citations

Abstract

Single crystals of BaLn2Te4 (Ln = Gd-Tm, Y) form as black needles from the stoichiometric reaction BaTe + 2Ln + 3Te at 1000°C. BaSm2Te4 forms as a by-product in the reaction BaTe + Sm+Zn + Te at 850°C with the aid of a BaBr2/KBr flux. The compounds crystallize with four formula units in the space group D2h16-Pnma (No. 62) in the CaFe2O4 (calcium ferrite) structure type. Unit cell constants range from a = 13.6883(10) Å, b = 4.5148(3) Å, and c = 16.3427(12) Å in the Sm compound to a = 13.5677(10) Å, b = 4.4058(3) A, and c = 15.9989(12) Å for Tm (t= -120°C). Ln atoms are coordinated by six Te atoms in an octahedral arrangement. These octahedra share corners and edges to form a three-dimensional channel structure. Ba atoms occupy the bicapped trigonal-prismatic sites within these channels. Magnetic susceptibility data for two representative compounds (Ln = Er and Tb) show paramagnetic behavior in the region 5-300 K.

Original languageEnglish (US)
Pages (from-to)432-439
Number of pages8
JournalJournal of Alloys and Compounds
Volume303-304
DOIs
StatePublished - May 24 2000
Event22nd Rare Earth Research Conference - Argonne, IL, United States
Duration: Jul 11 1999Jul 15 1999

Keywords

  • Rare-earths
  • Solid-state compounds
  • Synthesis
  • Tellurides

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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