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Pb2Sr2Cu2TaO8Cl, a New Layered Cuprate with Hematophanite Structure

✍ Scribed by Li Rukang

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 208 KB
Volume: 130
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.1996.7264

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✦ Synopsis

A new layered cuprate Pb 2 Sr 2 Cu 2 TaO 8 Cl has been successfully synthesized and identified by X-ray diffraction analysis. The compound crystallizes in the hematophanite structure with the space group P4/mmm. The lattice parameters of a ‫؍‬ 3.8921(1) A s s and c ‫؍‬ 15.3835(4) A s s were obtained by fitting the observed XRD pattern using the Rietveld refinement method. The structure of Pb 2 Sr 2 Cu 2 TaO 8 Cl is built up by [Pb 2 Cl] layer, CuO 5 pyramidal layers, and SrTaO 3 perovskite layer alternatively along the c direction. Although complete CuO 5 pyramidal planes exist in the present compounds, the as-prepared samples are insulating.

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