The crystal structure of the first synthetic copper(II) tellurite arsenate, CuII5(TeIVO3)2(AsVO4)2. Issue 1 (23rd December 2019)

• Record Type: Journal Article
• Authors: Missen, Owen P.; Weil, Matthias; Mills, Stuart J.; Libowitzky, Eugen
• Is Part Of: Acta crystallographica. Volume 76:Issue 1(2020:Feb.)
• Page Start: 1
• Page End: 6
• Publication Date: 2019-12-23
• Subjects: crystal structure -- tellurite -- arsenate -- chemical transport reaction -- fumarole
• DOI: 10.1107/S2052520619014823
• Languages: English
• ISSNs: 2052-5206

Abstract

Abstract : The crystal structure of the first synthetic copper tellurite arsenate, Cu II 5 (Te IV O3 )2 (As V O4 )2, has been determined using single‐crystal X‐ray diffraction supplemented by Raman spectroscopic investigations. Abstract : Crystals of the first synthetic copper tellurite arsenate, Cu II 5 (Te IV O3 )2 (As V O4 )2 [systematic name pentacopper(II) bis‐oxotellurate(IV) bis‐oxoarsenate(V)], were grown by the chemical vapour transport method and structurally determined using single‐crystal X‐ray diffraction. Cu II 5 (Te IV O3 )2 (As V O4 )2 possesses a novel structure type including a new topological arrangement of Cu II and O atoms. Cu II 5 (Te IV O3 )2 (As V O4 )2 is formed from a framework of two types of Jahn–Teller distorted [Cu II O6 ] octahedra (one of which is considerably elongated) and [Cu II O5 ] square pyramids, which are linked by edge‐sharing to form chains and dimers and by corner‐sharing to complete a three‐dimensional framework. [As V O4 ] tetrahedra and [Te IV O5 ] polyhedra bridge the edges of channels along the a ‐axis direction, with void space remaining for the Te IV stereoactive 5 s 2 lone pairs. A comparison is made between the crystal structure of Cu II 5 (Te IV O3 )2 (As V O4 )2 and those of known compounds and minerals, in particular fumarolitic Cu minerals.