On the preparation and structure of the compound Ta/sub 3/S/sub 1. 8/

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Materials Research Bulletin; (USA)

DOI:https://doi.org/10.1016/0025-5408(89)90124-4· OSTI ID:5307955

Wada, H; Onoda, M ^[1]

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1. National Inst. for Researches in Inorganic Materials, Tsukuba, Ibaraki (Japan)

The tantalum subsulfide with the composition Ta/sub 3/S/sub 1.8/ has been prepared by a sealed silica tube method at 1300{sup 0}C. The crystal structure of newly synthesized Ta/sub 3/S/sub 1.8/ has been determined to be Ta/sub 3/S/sub 2/-type from X-ray powder and electron diffraction data. The compound crystallizes in the orthorhombic system, space group Abm2 (no.39), with unit-cell dimensions: a=7.472, b=17.218, and c=5.598 A. The observed density is D/sub obs/=11.2g.cm/sup -3/. The unit cell contains eight formula units of Ta/sub 3/S/sub 1.8/. Refinement of structure of Ta/sub 3/S/sub 1.8/ was performed by a Rietveld analysis of X-ray diffraction data, the positional parameters being determined. It is found that the structure of Ta/sub 3/S/sub 1.8/ is closely related to that of Ta/sub 2/S. This compound is metallic at room temperature.

• OSTI ID: 5307955
• Journal Information: Materials Research Bulletin; (USA), Journal Name: Materials Research Bulletin; (USA) Vol. 24:2; ISSN MRBUA; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
CHEMICAL PREPARATION
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALLIZATION
DATA ANALYSIS
DIFFRACTION
MICROSTRUCTURE
MINERALS
ORTHORHOMBIC LATTICES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
REFRACTORY METAL COMPOUNDS
SCATTERING
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
TANTALUM COMPOUNDS
TANTALUM SULFIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION