Powder x-ray and IR studies of the new oxyselenides MOCuSe (M = Bi, Gd, Dy)

Journal Article · Tue Aug 01 04:00:00 EDT 1995 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1995.1312· OSTI ID:146451

Berdonosov, P S; Kusainova, A M; Kholodkovskaya, L N ^[1]

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1. Moscow State Univ. (Russian Federation); and others

The group of oxyselenides with the formula (MO)(CuSe) (M = Gd, Dy, and Ho) have been prepared by reacting M{sub 2}O{sub 3}, Cu, M, and Se at 750{degrees}C for 240 hr. All compounds were characterized by IR-spectra analysis. Powder diffraction structure analysis was made for GdOCuSe and DyOCuSe (Rietveld profile analysis) in P4/nmm symmetry. Crystal data are as follows: GdOCuSe, a = 3.9186(2), c = 8.723(5) {angstrom}; DyOCuSe, a = 3.8854(2), c = 8.701(4) {angstrom}; HoOCuSe, a = 3.866(2), c = 8.685(7) {angstrom}. Crystal structures are built up of [M{sub 2}O{sub 2}] fluorite-like layers (M = Gd, Dy), normal to the Z-axis, alternating with [Cu{sub 2}Se{sub 2}] layers formed by slightly distorted edge-sharing CuSe{sub 4} tetrahedra. The structures were compared with those of other similar layered compounds.

• Sponsoring Organization: USDOE
• OSTI ID: 146451
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 118; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
BISMUTH COMPOUNDS
COPPER COMPOUNDS
DYSPROSIUM COMPOUNDS
GADOLINIUM COMPOUNDS
OXIDES
SELENIDES
STRUCTURAL CHEMICAL ANALYSIS
X-RAY DIFFRACTION