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

Roderick D. Cannon; Upali A. Jayasooriya; Claire Tilford; Christopher E. Anson; Frank E. Sowrey; David R. Rosseinsky; John A. Stride; Francis Tasset; Eric Ressouche; Ross P. White; Rafik Ballou

doi:10.1021/ic0492340

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

Roderick D. Cannon, Upali A. Jayasooriya, Claire Tilford, Christopher E. Anson, Frank E. Sowrey, David R. Rosseinsky, John A. Stride, Francis Tasset, Eric Ressouche, Ross P. White, Rafik Ballou

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4 Citations (Scopus)

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%.

Original language	English
Pages (from-to)	7061-7067
Number of pages	7
Journal	Inorganic Chemistry
Volume	43
Issue number	22
DOIs	https://doi.org/10.1021/ic0492340
Publication status	Published - 2004

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10.1021/ic0492340

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@article{816ce286dc2340fa959c64713a8d45c8,

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

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%.",

author = "Cannon, {Roderick D.} and Jayasooriya, {Upali A.} and Claire Tilford and Anson, {Christopher E.} and Sowrey, {Frank E.} and Rosseinsky, {David R.} and Stride, {John A.} and Francis Tasset and Eric Ressouche and White, {Ross P.} and Rafik Ballou",

year = "2004",

doi = "10.1021/ic0492340",

language = "English",

volume = "43",

pages = "7061--7067",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "22",

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TY - JOUR

T1 - Electronic interaction in an outer-sphere mixed-valence double salt: A polarized neutron diffraction study of K3(MnO4)2

AU - Cannon, Roderick D.

AU - Jayasooriya, Upali A.

AU - Tilford, Claire

AU - Anson, Christopher E.

AU - Sowrey, Frank E.

AU - Rosseinsky, David R.

AU - Stride, John A.

AU - Tasset, Francis

AU - Ressouche, Eric

AU - White, Ross P.

AU - Ballou, Rafik

PY - 2004

Y1 - 2004

N2 - 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%.

AB - 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%.

U2 - 10.1021/ic0492340

DO - 10.1021/ic0492340

M3 - Article

VL - 43

SP - 7061

EP - 7067

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 22

ER -