Lithium cobalt(II) pyrophosphate, Li1.86CoP2O7, from synchrotron X-ray powder data
Open Access
- 30 September 2011
- journal article
- inorganic compounds
- Published by International Union of Crystallography (IUCr) in Acta Crystallographica Section E Structure Reports Online
- Vol. 67 (10) , i58-i59
Abstract
Structure refinement of high-resolution X-ray powder diffraction data of the title compound gave the composition Li(1.865)CoP(2)O(7), which is also verified by the ICP measurement. Two Co sites exist in the structure: one is a CoO(5) square pyramid and the other is a CoO(6) octa-hedron. They share edges and are further inter-connected through P(2)O(7) groups, forming a three-dimensional framework, which exhibits different kinds of inter-secting tunnels containing Li cations and could be of great inter-est in Li ion battery chemistry. The structure also exhibits cation disorder with 13.5% Co residing at the lithium (Li1) site. Co seems to have an average oxidation state of 2.135, as obtained from the strutural stochiometry that closely supports the magnetic susceptibility findings.Keywords
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