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[AS V V 12 V V 2 IV O 40 ] 7⊖ , a Topologically Interesting, Mixed Valence Cluster as Model for Vanadium Minerals Formed by Weathering
Author(s) -
Müller Achim,
Döring Joachim,
Khan M. Ishaque,
Wittneben Volker
Publication year - 1991
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199102101
Subject(s) - octahedron , vanadium , valence (chemistry) , crystallography , cluster (spacecraft) , ion , chemistry , physics , inorganic chemistry , crystal structure , organic chemistry , computer science , programming language
A surprisingly low V IV /V V ratio is present in the cluster anion of 1 . Its structure (picture right; V black, As shaded, O open circles) may be described as a {AsV 12 O 38 } unit with O h symmetry. It is formed from twelve VO 6 octahedra sharing edges, which each also share a face with the central AsO 6 octahedron. Two additional VO groups cap the AsO 6 octahedron.\documentclass{article}\usepackage{amssymb}\pagestyle{empty}\begin{document}$${\rm K_7[As^V{V_{12}^{V}}{V_2^{IV}}O_{40}]}\cdot 12\,{\rm H_2O}\quad {\bf 1}.$$\end{document}