NaV1-xP2S6 (x = 0.16): A new compound with infinite straight (1/)[V0.837P2 S6]- chains that exfoliate forming gels

Servane Coste, Eric Gautier, Michel Evain, Martine Bujoli-Doeuff, Raymond Brec, Stéphane Jobic*, Mercouri G. Kanatzidis

*Corresponding author for this work

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

The new 1D chalcogenophosphate material NaV0.837(6)P2S6 has been synthesized and its structure determined by X-ray powder diffraction analysis. This compound crystallizes in the monoclinic space group P21/n with a = 6.9677(3) Å, b = 5.9059(2) Å, c = 21.4537(8) Å, and β = 92.962(2)° [Z = 4, V = 881.66(8) Å3]. The Rietveld refinement led to Rp/Rwp = 0.0208/ 0.0271 (for 94 parameters refined). The material is isostructural with 1D-NaCrP2S6 and contains infinite (1/)[V0.837(6)P2 S6]- chains consisting of randomly occupied edge-sharing [VS6] octahedra defining zigzag (1/)[VS4] ribbons that are capped by tetradendate [P2S6] ethane-like groups linked to three successive [VS6] polyhedra. Because of the nonstoichiometry of the phase, the charge balance can be written as Na+(V4+)0.486(V3+) 0.351(P4+)2(S2-)6. NaV0.837(6)P2S6 is soluble in strongly polar organic solvents such as N-methylformamide (NMF). The exfoliation of NaV0.837(6)P2S6 in NMF leads to gels or to colored colloidal solutions with complex fluid behavior that depends strongly on concentration.

Original languageEnglish (US)
Pages (from-to)2323-2327
Number of pages5
JournalChemistry of Materials
Volume15
Issue number12
DOIs
StatePublished - Jun 17 2003

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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