Mixed crystal formation and structural studies in the mullite-type system Bi2Fe4O9–Bi2Mn4O10

Zachary R. Kann; Jeffrey T. Auletta; Eric W. Hearn; Sven-U. Weber; Klaus D. Becker; Hartmut Schneider; Michael W. Lufaso

doi:10.1016/j.jssc.2011.10.046

Mixed crystal formation and structural studies in the mullite-type system Bi2Fe4O9–Bi2Mn4O10

Zachary R. Kann, Jeffrey T. Auletta, Eric W. Hearn, Sven-U. Weber, Klaus D. Becker, Hartmut Schneider, Michael W. Lufaso

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

Abstract

The limits of metal cation substitution and distribution in the sequence Bi2Fe4O9–Bi2Mn4O10 have been investigated by solid state synthesis, X-ray powder diffraction, and Mössbauer spectroscopy. Rietveld refinements conducted for the entire range along the join indicate the structures are orthorhombic with space group Pbam, with partial transition-metal site disorder confirmed and detailed by Mössbauer spectroscopy. Single-phase regions are found near each end-member and a two-phase region is observed at intermediate compositions, extending from about x=1 to 3, according to the general formula of the mixed crystals Bi2Fe4−xMnxO10−δ. An incorporation of Mn at octahedral sites replacing Fe is taken into account for the Bi2Fe4O9-related side of the system. Charge compensation is believed to be effected by addition of O, which gives rise to the formation of FeO5 pyramids. At the Bi2Mn4O10-related side of the system, substitution of pyramidal Mn3+ by Fe3+ is envisaged.

Original language	American English
Pages (from-to)	62-71
Number of pages	10
Journal	Journal of Solid State Chemistry
Volume	185
DOIs	https://doi.org/10.1016/j.jssc.2011.10.046
State	Published - Jan 2012

Keywords

Oxide
Mössbauer
Mullite
Solid solution

Disciplines

Physics
Quantum Physics
Metallurgy
Other Earth Sciences
Mineral Physics

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10.1016/j.jssc.2011.10.046License: Unspecified

Cite this

@article{bab391d3fd5140b5a39a402dd60427b2,

title = "Mixed crystal formation and structural studies in the mullite-type system Bi2Fe4O9–Bi2Mn4O10",

abstract = "The limits of metal cation substitution and distribution in the sequence Bi2Fe4O9–Bi2Mn4O10 have been investigated by solid state synthesis, X-ray powder diffraction, and M{\"o}ssbauer spectroscopy. Rietveld refinements conducted for the entire range along the join indicate the structures are orthorhombic with space group Pbam, with partial transition-metal site disorder confirmed and detailed by M{\"o}ssbauer spectroscopy. Single-phase regions are found near each end-member and a two-phase region is observed at intermediate compositions, extending from about x=1 to 3, according to the general formula of the mixed crystals Bi2Fe4−xMnxO10−δ. An incorporation of Mn at octahedral sites replacing Fe is taken into account for the Bi2Fe4O9-related side of the system. Charge compensation is believed to be effected by addition of O, which gives rise to the formation of FeO5 pyramids. At the Bi2Mn4O10-related side of the system, substitution of pyramidal Mn3+ by Fe3+ is envisaged.",

keywords = "Oxide, M{\"o}ssbauer, Mullite, Solid solution",

author = "Kann, {Zachary R.} and Auletta, {Jeffrey T.} and Hearn, {Eric W.} and Sven-U. Weber and Becker, {Klaus D.} and Hartmut Schneider and Lufaso, {Michael W.}",

note = "Kann, Z. R., Auletta, J.T., Hearn, E.W., Weber, S., Becker, K.D., Schneider, H., Lufaso, M.W. (2012) Mixed crystal formation and structural studies in the mullite-type system Bi2Fe4O9–Bi2Mn4O10. Journal of Solid State Chemistry, 185, 62-71. https://doi.org/10.1016/j.jssc.2011.10.046. ",

year = "2012",

month = jan,

doi = "10.1016/j.jssc.2011.10.046",

language = "American English",

volume = "185",

pages = "62--71",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

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TY - JOUR

T1 - Mixed crystal formation and structural studies in the mullite-type system Bi2Fe4O9–Bi2Mn4O10

AU - Kann, Zachary R.

AU - Auletta, Jeffrey T.

AU - Hearn, Eric W.

AU - Weber, Sven-U.

AU - Becker, Klaus D.

AU - Schneider, Hartmut

AU - Lufaso, Michael W.

N1 - Kann, Z. R., Auletta, J.T., Hearn, E.W., Weber, S., Becker, K.D., Schneider, H., Lufaso, M.W. (2012) Mixed crystal formation and structural studies in the mullite-type system Bi2Fe4O9–Bi2Mn4O10. Journal of Solid State Chemistry, 185, 62-71. https://doi.org/10.1016/j.jssc.2011.10.046.

PY - 2012/1

Y1 - 2012/1

N2 - The limits of metal cation substitution and distribution in the sequence Bi2Fe4O9–Bi2Mn4O10 have been investigated by solid state synthesis, X-ray powder diffraction, and Mössbauer spectroscopy. Rietveld refinements conducted for the entire range along the join indicate the structures are orthorhombic with space group Pbam, with partial transition-metal site disorder confirmed and detailed by Mössbauer spectroscopy. Single-phase regions are found near each end-member and a two-phase region is observed at intermediate compositions, extending from about x=1 to 3, according to the general formula of the mixed crystals Bi2Fe4−xMnxO10−δ. An incorporation of Mn at octahedral sites replacing Fe is taken into account for the Bi2Fe4O9-related side of the system. Charge compensation is believed to be effected by addition of O, which gives rise to the formation of FeO5 pyramids. At the Bi2Mn4O10-related side of the system, substitution of pyramidal Mn3+ by Fe3+ is envisaged.

AB - The limits of metal cation substitution and distribution in the sequence Bi2Fe4O9–Bi2Mn4O10 have been investigated by solid state synthesis, X-ray powder diffraction, and Mössbauer spectroscopy. Rietveld refinements conducted for the entire range along the join indicate the structures are orthorhombic with space group Pbam, with partial transition-metal site disorder confirmed and detailed by Mössbauer spectroscopy. Single-phase regions are found near each end-member and a two-phase region is observed at intermediate compositions, extending from about x=1 to 3, according to the general formula of the mixed crystals Bi2Fe4−xMnxO10−δ. An incorporation of Mn at octahedral sites replacing Fe is taken into account for the Bi2Fe4O9-related side of the system. Charge compensation is believed to be effected by addition of O, which gives rise to the formation of FeO5 pyramids. At the Bi2Mn4O10-related side of the system, substitution of pyramidal Mn3+ by Fe3+ is envisaged.

KW - Oxide

KW - Mössbauer

KW - Mullite

KW - Solid solution

U2 - 10.1016/j.jssc.2011.10.046

DO - 10.1016/j.jssc.2011.10.046

M3 - Article

SN - 0022-4596

VL - 185

SP - 62

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JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

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