Syntheses, crystal structures, and optical and magnetic properties of some CsLnCoQ3 compounds (Ln = Tm and Yb, Q = S; Ln = Ho and Yb, Q = Se)

George H. Chan*, Leif J. Sherry, Richard P Van Duyne, James A Ibers

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The four new compounds CsTmCoS3, CsYbCoS3, CsHoCoSe3, and CsYbCoSe3 have been synthesized at 1123 K. These black-colored isostructural compounds crystallize in the KZrCuS 3 structure type with four formula units in space group Cmcm of the orthorhombic system. The structure of these compounds is composed of 2[LnCoQ3 -] layers separated by Cs atoms. Because there are no Q-Q bonds, the formal oxidation states of Cs/Ln/Co/Q are 1+/3+/2+/2-, respectively. CsHoCoSe3 shows paramagnetic behavior with μeff = 11.9(1) μB, whereas CsYbCoS3 displays an antiferromagnetic-like transition at ∼2.7 K with μeff = 5.85(1) μB. Both CsYbCoS 3 and CsYbCoSe3 exhibit optical band gaps in the near infrared region and broad absorption bands at lower energies.

Original languageEnglish (US)
Pages (from-to)1343-1348
Number of pages6
JournalZeitschrift fur Anorganische und Allgemeine Chemie
Volume633
Issue number9
DOIs
StatePublished - Aug 1 2007

Keywords

  • Chalcogenides
  • Cobalt
  • Crystal structures
  • Magnetic properties
  • Optical properties
  • Rare earth
  • Solid-state chemistry

ASJC Scopus subject areas

  • Inorganic Chemistry

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