Powder X-ray and IR studies of the new oxyselenides MOCuSe (M= Bi, Gd, Dy)
PS Berdonosov, AM Kusainova… - Journal of Solid State …, 1995 - Elsevier
PS Berdonosov, AM Kusainova, LN Kholodkovskaya, VA Dolgikh, LG Akselrud…
Journal of Solid State Chemistry, 1995•ElsevierThe group of oxyselenides with the formula (MO)(CuSe)(M= Gd, Dy, and Ho) has been
prepared by reacting M2O3, Cu, M, and Se at 750° 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) Å; DyOCuSe, a= 3.8854 (2), c= 8.701 (4)
Å; HoOCuSe, a= 3.866 (2), c= 8.685 (7) Å. Crystal structures are built up of [M2O2] fluorite …
prepared by reacting M2O3, Cu, M, and Se at 750° 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) Å; DyOCuSe, a= 3.8854 (2), c= 8.701 (4)
Å; HoOCuSe, a= 3.866 (2), c= 8.685 (7) Å. Crystal structures are built up of [M2O2] fluorite …
The group of oxyselenides with the formula (MO)(CuSe) (M = Gd, Dy, and Ho) has been prepared by reacting M2O3, Cu, M, and Se at 750°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) Å; DyOCuSe, a = 3.8854(2), c = 8.701(4) Å; HoOCuSe, a = 3.866(2), c = 8.685(7) Å. Crystal structures are built up of [M2O2] fluorite-like layers (M = Gd, Dy), normal to the Z-axis, alternating with [Cu2Se2] layers formed by slightly distorted edge-sharing CuSe4 tetrahedra. The structures were compared with those of other similar layered compounds.
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