The defect structures of Mn1-xO

M. J. Radler; J. B. Cohen; G. P. Sykora; T. Mason; D. E. Ellis; John Faber

doi:10.1016/0022-3697(92)90022-6

The defect structures of Mn_1-xO

M. J. Radler^*, J. B. Cohen, G. P. Sykora, T. Mason, D. E. Ellis, John Faber

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

In situ neutron powder diffraction patterns analyzed by the Rietveld technique show no interstitial occupation for 0 < x < 0.05 at 1673 K. At a larger deviation from stoichiometry, x = 0.09, an interstitial occupation of 2(1) pct. has been measured, similar to that observed for Fe_1-xO at 1323 K. The vacancy interstitial ratio of 5.5 is indicative of a mixture of small cation vacancy clusters and unassociated cation vacancies. New theoretical results indicate that the oxygen shell around a defect cluster expands to help stablize the cluster. In situ X-ray single crystal diffraction studies of Mn_1-xO (0<x<0.056) at 1573K show no superstructure peaks or diffuse maxima in reciprocal space where maxima are observed for Fe_1-xO. By comparison with the absolute intensities from diffuse scattering in Fe_1-xO it is evident that even a small degree of cluster ordering should have been visible, even at 1573K. This information is employed to model new measurements of conductivity at large deviations from stoichiometry.

Original language	English (US)
Pages (from-to)	141-154
Number of pages	14
Journal	Journal of Physics and Chemistry of Solids
Volume	53
Issue number	1
DOIs	https://doi.org/10.1016/0022-3697(92)90022-6
State	Published - Jan 1992

Funding

Acknowledgements-Thwiso rk has benefitedg reatlyf rom the use of the IntenseP ulsed Neutron Sourcea t Argonne National Laboratory, supported by the Departmento f Energy under contractB ESMaterials SciencesW -3 1-109-ENG-38 at ANL. Work performeda t Northwesternw as supportedb y the Departmento f Energy under contract DOE-FGO284ER45097t;h e X-ray measuremenwtse reo b-tained in NorthwesternU niversity’s X-ray’s Diffraction Facility, supportedi n part by NSF’s Materials Research Center underc ontractN o. DMR 8821571.

Keywords

Manganous oxide
defect clusters in oxides
defects in oxides
electrical conductivity in oxides
manganosite
oxides
transition metal oxides

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

Access to Document

10.1016/0022-3697(92)90022-6

Cite this

@article{53d578607752425c8655cfe12d993c6b,

title = "The defect structures of Mn1-xO",

abstract = "In situ neutron powder diffraction patterns analyzed by the Rietveld technique show no interstitial occupation for 0 < x < 0.05 at 1673 K. At a larger deviation from stoichiometry, x = 0.09, an interstitial occupation of 2(1) pct. has been measured, similar to that observed for Fe1-xO at 1323 K. The vacancy interstitial ratio of 5.5 is indicative of a mixture of small cation vacancy clusters and unassociated cation vacancies. New theoretical results indicate that the oxygen shell around a defect cluster expands to help stablize the cluster. In situ X-ray single crystal diffraction studies of Mn1-xO (01-xO. By comparison with the absolute intensities from diffuse scattering in Fe1-xO it is evident that even a small degree of cluster ordering should have been visible, even at 1573K. This information is employed to model new measurements of conductivity at large deviations from stoichiometry.",

keywords = "Manganous oxide, defect clusters in oxides, defects in oxides, electrical conductivity in oxides, manganosite, oxides, transition metal oxides",

author = "Radler, {M. J.} and Cohen, {J. B.} and Sykora, {G. P.} and T. Mason and Ellis, {D. E.} and John Faber",

note = "Funding Information: Acknowledgements-Thwiso rk has benefitedg reatlyf rom the use of the IntenseP ulsed Neutron Sourcea t Argonne National Laboratory, supported by the Departmento f Energy under contractB ESMaterials SciencesW -3 1-109-ENG-38 at ANL. Work performeda t Northwesternw as supportedb y the Departmento f Energy under contract DOE-FGO284ER45097t;h e X-ray measuremenwtse reo b-tained in NorthwesternU niversity{\textquoteright}s X-ray{\textquoteright}s Diffraction Facility, supportedi n part by NSF{\textquoteright}s Materials Research Center underc ontractN o. DMR 8821571.",

year = "1992",

month = jan,

doi = "10.1016/0022-3697(92)90022-6",

language = "English (US)",

volume = "53",

pages = "141--154",

journal = "Journal of Physics and Chemistry of Solids",

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T1 - The defect structures of Mn1-xO

AU - Radler, M. J.

AU - Cohen, J. B.

AU - Sykora, G. P.

AU - Mason, T.

AU - Ellis, D. E.

AU - Faber, John

N1 - Funding Information: Acknowledgements-Thwiso rk has benefitedg reatlyf rom the use of the IntenseP ulsed Neutron Sourcea t Argonne National Laboratory, supported by the Departmento f Energy under contractB ESMaterials SciencesW -3 1-109-ENG-38 at ANL. Work performeda t Northwesternw as supportedb y the Departmento f Energy under contract DOE-FGO284ER45097t;h e X-ray measuremenwtse reo b-tained in NorthwesternU niversity’s X-ray’s Diffraction Facility, supportedi n part by NSF’s Materials Research Center underc ontractN o. DMR 8821571.

PY - 1992/1

Y1 - 1992/1

N2 - In situ neutron powder diffraction patterns analyzed by the Rietveld technique show no interstitial occupation for 0 < x < 0.05 at 1673 K. At a larger deviation from stoichiometry, x = 0.09, an interstitial occupation of 2(1) pct. has been measured, similar to that observed for Fe1-xO at 1323 K. The vacancy interstitial ratio of 5.5 is indicative of a mixture of small cation vacancy clusters and unassociated cation vacancies. New theoretical results indicate that the oxygen shell around a defect cluster expands to help stablize the cluster. In situ X-ray single crystal diffraction studies of Mn1-xO (01-xO. By comparison with the absolute intensities from diffuse scattering in Fe1-xO it is evident that even a small degree of cluster ordering should have been visible, even at 1573K. This information is employed to model new measurements of conductivity at large deviations from stoichiometry.

AB - In situ neutron powder diffraction patterns analyzed by the Rietveld technique show no interstitial occupation for 0 < x < 0.05 at 1673 K. At a larger deviation from stoichiometry, x = 0.09, an interstitial occupation of 2(1) pct. has been measured, similar to that observed for Fe1-xO at 1323 K. The vacancy interstitial ratio of 5.5 is indicative of a mixture of small cation vacancy clusters and unassociated cation vacancies. New theoretical results indicate that the oxygen shell around a defect cluster expands to help stablize the cluster. In situ X-ray single crystal diffraction studies of Mn1-xO (01-xO. By comparison with the absolute intensities from diffuse scattering in Fe1-xO it is evident that even a small degree of cluster ordering should have been visible, even at 1573K. This information is employed to model new measurements of conductivity at large deviations from stoichiometry.

KW - Manganous oxide

KW - defect clusters in oxides

KW - defects in oxides

KW - electrical conductivity in oxides

KW - manganosite

KW - oxides

KW - transition metal oxides

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