Synthesis and characterization of two crystallographic forms of Ag 0.79VS2

Mazhar N. Ali, Huiwen Ji, Daigorou Hirai, M. K. Fuccillo, R. J. Cava

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3 Scopus citations

Abstract

A previously unreported compound, Ag0.79VS2, has been synthesized; its structure and elementary properties are reported. Ag 0.79VS2 crystallizes in two forms, designated as the α and β, related to the 1s-InTaS2 structure. Single crystal x-ray diffraction shows the α form to have a single layer hexagonal structure with a unit cell of 3.213(3) Å×7.809(6) Å, consisting of layers of edge-shared VS6 triangular prisms separated by layers of Ag. The β form is similar but has an ao(3) supercell in the basal plane, yielding a unit cell of 5.573(5) Å×7.822(6) Å. Both forms have disordered and displaced silver in the basal plane, but the β form has partial ordering of its silver sublattice and in-plane vanadium trimers. Resistivity measurements show metallic temperature dependence with an unusual hysteresis between 210 K and 130 K. Magnetic susceptibility measurements show Pauli Paramagnetic behavior. The Seebeck coefficient at 300 K is 42 μV/K.

Original languageEnglish (US)
Pages (from-to)77-84
Number of pages8
JournalJournal of Solid State Chemistry
Volume202
DOIs
StatePublished - Jun 1 2013

All Science Journal Classification (ASJC) codes

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

Keywords

  • Crystallography
  • Dichalcogenide
  • Honeycomb
  • Layered
  • Trimer
  • Vanadium sulfide

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