A layer structure: The titanoniobate CsTi2NbO7 |
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| Authors: | M. Hervieu B. Raveau |
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| Affiliation: | Laboratoire de Cristallographie et Chimie du Solide, L.A. 251, ISMRA, Universite´de Caen, 14032 Caen Cedex, France |
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| Abstract: | A new oxide, CsTi2NbO7, with a structure related to that of KTiNbO5 has been prepared and described. This titanoniobate, with orthorhombic symmetry, has the unit-cell dimensionsa = 9.326, b = 18.412, andc = 3.798A?. From the electron diffraction results two space groups,Pna21 orPnam, are possible. Its structure, which has been studied from powder data, is built up from units of 2 × 3 edge-sharing octahedra; these units share the corners of their octahedra, forming puckered layers. The layers are held together by cesium ions in distorted cubic sites, as in KTiNbO5. |
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