Structural characterization of chemically synthesized cubic lanthanum sulphide (γ-La2S3)

Prashant N. Kumta, Vinayak P Dravid, Subhash H. Risbud

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Cubic lanthanum sulphide (γ-La2S3) belongs to the family of rare-earth chalcogenides and is a potential far-infrared (8-14 μm) transmitting material. Low- temperature chemical techniques incorporating organometallics have been employed to synthesize ultrafine sulphide precursors (about 20 nm in size) at room temperature. The precursors transform to form cubic (γ-La2S3) powders at 1000°C. The thermal stability, phase evolution characteristics and microstructure of the fine particles have been investigated using differential scanning calorimetry, X-ray diffraction and electron microscopy. Convergent-beam electron diffraction was performed on the crystalline powders and hot-pressed ceramics and the space group was identified to be 143d.

Original languageEnglish (US)
Pages (from-to)67-84
Number of pages18
JournalPhilosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Volume68
Issue number1
DOIs
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)

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