Crystal structure of the incommensurate modulated composite ruthenate [Ba]1.30[(Ru,Cu)O3]
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Barbara Schüpp-Niewa
Abstract
[Ba]1.30[(Ru,Cu)O3] crystallizes in a modulated composite crystal structure previously observed for [Ba]x[(Pt,Cu)O3], x = 1.317. The composite structure is refined in one centrosymmetric and one non-centrosymmetric model in the superspace groups P-31c(00γ) and P31c(00γ), respectively, with a = 10.135(1) Å, c = 4.2902(3) Å and q = 1.601(1)c*. The centrosymmetric case was refined using Crenel functions. The first substructure is formed by Ba cations located in channels of the second substructure, which consists of one-dimensional chains of face-sharing polyhedra ∞1[O3/2(Ru,Cu)O3/2]: alternating blocks of mostly three octahedra and trigonal prisms. DC-susceptibility measurements result in typical spin-glass behavior, an effective magnetic moment of μeff = 2.55μB, and a Weiss temperature of θp = -202 K.
© by Oldenbourg Wissenschaftsverlag, Stuttgart, Germany
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- Structure determination without Fourier inversion. Part VI: High resolution direct space structure information from one-dimensional data obtained with two wavelengths
- Crystal structure of the incommensurate modulated composite ruthenate [Ba]1.30[(Ru,Cu)O3]
- Crystal structure of the metal-rich phosphide Sm15Ir33P26
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Articles in the same Issue
- Structure determination without Fourier inversion. Part VI: High resolution direct space structure information from one-dimensional data obtained with two wavelengths
- Crystal structure of the incommensurate modulated composite ruthenate [Ba]1.30[(Ru,Cu)O3]
- Crystal structure of the metal-rich phosphide Sm15Ir33P26
- Pyroxene from martian meteorite NWA856: Structural investigations by X-ray and neutron diffraction
- The crystal structure of Sr-hardystonite, Sr2ZnSi2O7
- The restrained Rietveld refinement of modulated trivalent metal polyphosphates M(PO3)3
