Abstract
The crystal structure redetermination of Sr2PdO3 (distrontium palladium trioxide) was carried out using high-quality single-crystal X-ray data. The Sr2PdO3 structure has been described previously in at least three reports [Wasel-Nielen & Hoppe (1970 ▸). Z. Anorg. Allg. Chem. 375, 209-213; Muller & Roy (1971 ▸). Adv. Chem. Ser. 98, 28-38; Nagata et al. (2002 ▸). J. Alloys Compd. 346, 50-56], all based on powder X-ray diffraction data. The current structure refinement of Sr2PdO3, as compared to previous powder data refinements, leads to more precise cell parameters and fractional coordinates, together with anisotropic displacement parameters for all sites. The compound is confirmed to have the ortho-rhom-bic Sr2CuO3 structure type (space group Immm) as reported previously. The structure consists of infinite chains of corner-sharing PdO4 plaquettes inter-spersed by SrII atoms. A brief comparison of Sr2PdO3 with the related K2NiF4 structure type is given.
Highlights
The crystal structure redetermination of Sr2PdO3 was carried out using high-quality single-crystal X-ray data
The structure consists of infinite chains of corner-sharing PdO4 plaquettes interspersed by SrII atoms
A redetermination of Sr2PdO3 based on single crystal X-ray data seemed appropriate
Summary
Low-dimensional transition-metal oxides with chain structures have received attention since they can enable interesting physical phenomena such as spin 1/2 antiferromagnetic Heisenberg coupling (Motoyama et al, 1996; Takigawa et al, 1996), superconductivity (Hiroi et al, 1993), ultrafast nonlinear optical response (Ogasawara et al, 2000) or even glucose sensing (El-Ads et al, 2016). We address Sr2PdO3, which has previously been obtained as a microcrystalline material (Wasel-Nielen & Hoppe, 1970; Muller & Roy, 1971; Nagata et al, 2002). Based on evaluations of powder X-ray diffractograms, Sr2PdO3 was identified as being isostructural with Sr2CuO3 (Teske & Muller-Buschbaum, 1969; Weller & Lines, 1989) and Sr2FeO3 (Tassel et al, 2013). Structural details derived from the given atomic parameters have only been reported with large uncertainties (Muller & Roy, 1971; Nagata et al, 2002). A redetermination of Sr2PdO3 based on single crystal X-ray data seemed appropriate
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