Acta Cryst. (2005). E61, i67-i69  [ doi:10.1107/S1600536805008998 ]

Composé à charpente bidimensionnelle K₃Fe₃(AsO₄)₄

N. Ouerfelli, M. F. Zid and T. Jouini

Abstract: Tripotassium triiron(III) tetraarsenate, K₃Fe₃(AsO₄)₄, has been synthesized at high temperature by solid-state reaction. The structure is built up from corner- and edge-sharing between FeO₆ octahedra and AsO₄ tetrahedra. The structure can be described as infinite anionic layers parallel to the (010) plane. Alkali metal cations are located in the interlayer space. The relationship between the title compound and K₃Fe₃(PO₄)₄·H₂O structures is discussed. The title compound is isostructural with K₃Cr₃(AsO₄)₄.

Online 9 avril 2005

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