Synthesis and crystal structure of ABW-type SrFe1.40V0.60O4

Thomas Gstir; Volker Kahlenberg; Hannes Krüger; Simon Penner

doi:10.1107/S205698902000496X

Synthesis and crystal structure of ABW-type SrFe_1.40V_0.60O₄

Acta Crystallogr E Crystallogr Commun. 2020 Apr 17;76(Pt 5):664-667. doi: 10.1107/S205698902000496X. eCollection 2020 May 1.

Authors

Thomas Gstir¹, Volker Kahlenberg¹, Hannes Krüger¹, Simon Penner²

Affiliations

¹ University of Innsbruck, Institute of Mineralogy & Petrography, Innrain 52, A-6020 Innsbruck, Austria.
² University of Innsbruck, Department of Physical Chemistry, Innrain 52c, A-6020 Innsbruck, Austria.

Abstract

Single crystals of SrFe_1.40V_0.60O₄, strontium tetra-oxidodi[ferrate(III)/vanad-ate(III)], have been obtained as a side product in the course of sinter experiments aimed at the synthesis of double perovskites in the system SrO-Fe₂O₃-V₂O₅. The crystal structure can be characterized by layers of six-membered rings of TO₄-tetra-hedra (T: Fe^III, V^III) perpendicular to [100]. Stacking of the layers along [100] results in a three-dimensional framework enclosing tunnel-like cavities in which Sr^II cations are incorporated for charge compensation. The sequence of directedness of up (U) and down (D) pointing vertices of neighboring tetra-hedra in a single six-membered ring is UUUDDD. The topology of the tetra-hedral framework belongs to the zeolite-type ABW.

Keywords: ABW; cation substitution; crystal structure; solid solution; topology; zeolite.