Electronic interaction in an outer-sphere mixed-valence double salt: A polarized neutron diffraction study of K3(MnO4)2

Cannon, Roderick D., Jayasooriya, Upali A., Tilford, Claire, Anson, Christopher E., Sowrey, Frank E., Rosseinsky, David R., Stride, John A., Tasset, Francis, Ressouche, Eric, White, Ross P. and Ballou, Rafik (2004) Electronic interaction in an outer-sphere mixed-valence double salt: A polarized neutron diffraction study of K3(MnO4)2. Inorganic Chemistry, 43 (22). pp. 7061-7067.

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Abstract

The mixed-valence double salt K-3(MnO4)(2) crystallizes in space group P2(1)/m with Z = 2. The manganese centers Mn1 and Mn2 constitute discrete "permanganate", [Mn(VII)O4](-), and "manganate", [(MnO4)-O-VI](2-), ions, respectively. There is a spin-ordering transition to an antiferromagnetic state at ca. T = 5 K. The spin-density distribution in the paramagnetic phase at T= 10 K has been determined by polarized neutron diffraction, confirming that unpaired spin is largely confined to the nominal manganate ion Mn2. Through use of both Fourier refinement and maximum entropy methods, the spin on Mn1 is estimated as 1.75+/-1% of one unpaired electron with an upper limit of 2.5%.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Depositing User: Rachel Smith
Date Deposited: 09 May 2011 12:48
Last Modified: 29 Apr 2020 23:43
URI: https://ueaeprints.uea.ac.uk/id/eprint/29793
DOI: 10.1021/ic0492340

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