Synthesis of tetragonal mackinawite-type FeS nanosheets by solvothermal crystallization

Ian T. Sines, Dimitri D. Vaughn, Rajiv Misra, Eric J. Popczun, Raymond E. Schaak

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29 Scopus citations

Abstract

Mackinawite, a metastable 1:1 compound of iron and sulfur that adopts an anti-PbO-type structure, is of interest because of its relationship to known iron chalcogenide superconductors, as well as its biogeochemical relevance. Colloidal nanosheets of mackinawite-type FeS were synthesized by first generating an amorphous Fe-S precursor via the aqueous room-temperature co-precipitation of Fe 2 and S 2-, then solvothermally crystallizing it in ethylene glycol at 200 °C in an autoclave. The product is highly crystalline, with lattice constants of a=3.674(3) Å and c=5.0354(3) Å. The nanosheets, with their surface normal oriented along the [0 0 1] direction, are irregularly faceted with edge lengths that range from 100 nm to over 1 μm and average thicknesses of approx. 30 nm. The samples showed a ferromagnetic background signal with no evidence of superconductivity.

Original languageEnglish (US)
Pages (from-to)17-20
Number of pages4
JournalJournal of Solid State Chemistry
Volume196
DOIs
StatePublished - Dec 2012

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

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