A new oxytelluride: Perovskite and CsCl intergrowth in Ba 3Yb2O5Te

Abstract

The new oxytelluride Ba3Yb2O5Te was obtained from an alkaline earth flux. Ba3Yb2O 5Te crystallizes in the tetragonal space group P4/mmm (#123), with a=4.3615(3)Å and c=11.7596(11)Å, Z = 1. The structure combines two distinct building blocks, a Ba2Yb2O5 perovskite-like double layer with square bipyramidal coordination of the ytterbium ions, and a CsCl-type BaTe layer. Short range magnetic order is apparent at below 5 K, with the magnetic behavior above this temperature dominated by crystal field effects. The structure may be considered as an analog to the Ruddlesden-Popper phases, where the NaCl-type layer has been replaced by the CsCl-type layer. The two-dimensional magnetic behavior is expected based on the highly anisotropic nature of the structure. © 2013 Elsevier Inc. All rights reserved.

Document Type

Article

DOI

https://doi.org/10.1016/j.jssc.2013.04.030

Keywords

Flux crystal growth, Oxytelluride, Perovskite, Single crystal, Synthesis

Publication Date

1-1-2013

Journal Title

Journal of Solid State Chemistry

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