Preparation of new strontium niobium sulfide and strontium tantalum sulfide

Journal Article · Mon Mar 01 04:00:00 EST 1993 · Materials Research Bulletin; (United States)

DOI:https://doi.org/10.1016/0025-5408(93)90162-7· OSTI ID:6446051

Saeki, Masanobu; Onoda, Mitsuko; Ohta, Masatsune ^[1]

---

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

New strontium ternary sulfides, SrM[sub 2]S[sub 5] (M=NB, Ta), have been prepared by the reaction of CS[sub 2] with a mixture of SrCO[sub 3] and Nb[sub 2]O[sub 5], or SrCO[sub 3] and Ta[sub 2]O[sub 5]. The powder X-ray diffraction patterns were indexable on the basis of hexagonal cells with lattice parameters of a=3.3592 (7) [angstrom], c=23.995 (6) [angstrom] for SrNb[sub 2]S[sub 5], and a=3.3063 (5) [angstrom], c=24.276 (4) [angstrom] for SrTa[sub 2]S[sub 5]. The electron diffraction measurements, however, revealed the existence of the supercells of [radical]28a x [radical]28a for SrTa[sub 2]S[sub 5]. Superconductivities with Tc's around 3K were observed in SrTa[sub 2]S[sub 5] and SrNb[sub 2]S[sub 5].

• OSTI ID: 6446051
• Journal Information: Materials Research Bulletin; (United States), Journal Name: Materials Research Bulletin; (United States) Vol. 28:3; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
360602 -- Other Materials-- Structure & Phase Studies
360607 -- Other Materials-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LATTICE PARAMETERS
MICROSTRUCTURE
MIXTURES
NIOBIUM COMPOUNDS
NIOBIUM SULFIDES
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SCATTERING
STRONTIUM COMPOUNDS
STRONTIUM SULFIDES
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTIVITY
SYNTHESIS
TANTALUM COMPOUNDS
TANTALUM SULFIDES
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION