Mn, Mg, and Zn ilmenite group titanates: A reconnaissance rietveld study

doi:10.1134/S1063774506030047

Title: Mn, Mg, and Zn ilmenite group titanates: A reconnaissance rietveld study

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Abstract

Ecandrewsite-geikielite (Zn{sub 1/2}Mg{sub 1/2}TiO{sub 3}), ecandrewsite-pyrophanite (Zn{sub 1/2}Mn{sub 1/2}TiO{sub 3}), pyrophanite-geikielite (Mg{sub 1/2}Mn{sub 1/2}TiO{sub 3}), and ecandrewsite-pyrophanite-geikielite (Zn{sub 1/3}Mn{sub 1/3}Mg{sub 1/3}TiO{sub 3}) titanates were synthesized at 900-1000 deg. C at ambient pressure. All of the compounds adopt R- ilmenite-type structures. These structures were refined by the Rietveld method from X-ray powder diffraction data. Unit cell parameters and unit cell volumes decrease with decreasing average radii of the A{sup 2+} cation. All structures consist of distorted AO{sub 6} and TiO{sub 6} octahedra. In common with pyrophanite and ilmenite, the distortion of the AO{sub 6} octahedra is less than that of the TiO{sub 6} octahedra. Data are given for the volumes and distortion indexes of all coordination polyhedra.

Authors:

Liferovich, R. P. ^[1]; Mitchell, R. H. ^[2]

Russian Academy of Sciences, Geological Institute, Kola Science Center (Russian Federation)
Lakehead University, Department of Geology (Canada), E-mail: rmitchel@lakeheadu.ca

Publication Date:: Mon May 15 00:00:00 EDT 2006

OSTI Identifier:: 21091487

Resource Type:: Journal Article

Resource Relation:: Journal Name: Crystallography Reports; Journal Volume: 51; Journal Issue: 3; Other Information: DOI: 10.1134/S1063774506030047; Copyright (c) 2006 Nauka/Interperiodica; Article Copyright (c) 2006 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; ILMENITE; MAGNESIUM COMPOUNDS; MANGANESE COMPOUNDS; TITANATES; X-RAY DIFFRACTION; ZINC COMPOUNDS

Citation Formats


                    Liferovich, R. P., and Mitchell, R. H. Mn, Mg, and Zn ilmenite group titanates: A reconnaissance rietveld study.  United States: N. p., 2006. 
        Web.  doi:10.1134/S1063774506030047.

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                    Liferovich, R. P., & Mitchell, R. H. Mn, Mg, and Zn ilmenite group titanates: A reconnaissance rietveld study.  United States.  doi:10.1134/S1063774506030047.

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                    Liferovich, R. P., and Mitchell, R. H. Mon .  
        "Mn, Mg, and Zn ilmenite group titanates: A reconnaissance rietveld study".  United States.  
        doi:10.1134/S1063774506030047.

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@article{osti_21091487,

  title        = {Mn, Mg, and Zn ilmenite group titanates: A reconnaissance rietveld study},

  author       = {Liferovich, R. P. and Mitchell, R. H.},

  abstractNote = {Ecandrewsite-geikielite (Zn{sub 1/2}Mg{sub 1/2}TiO{sub 3}), ecandrewsite-pyrophanite (Zn{sub 1/2}Mn{sub 1/2}TiO{sub 3}), pyrophanite-geikielite (Mg{sub 1/2}Mn{sub 1/2}TiO{sub 3}), and ecandrewsite-pyrophanite-geikielite (Zn{sub 1/3}Mn{sub 1/3}Mg{sub 1/3}TiO{sub 3}) titanates were synthesized at 900-1000 deg. C at ambient pressure. All of the compounds adopt R- ilmenite-type structures. These structures were refined by the Rietveld method from X-ray powder diffraction data. Unit cell parameters and unit cell volumes decrease with decreasing average radii of the A{sup 2+} cation. All structures consist of distorted AO{sub 6} and TiO{sub 6} octahedra. In common with pyrophanite and ilmenite, the distortion of the AO{sub 6} octahedra is less than that of the TiO{sub 6} octahedra. Data are given for the volumes and distortion indexes of all coordination polyhedra.},

  doi          = {10.1134/S1063774506030047},

  journal      = {Crystallography Reports},

  number       = 3,

  volume       = 51,

  place        = {United States},

  year         = {Mon May 15 00:00:00 EDT 2006},

  month        = {Mon May 15 00:00:00 EDT 2006}

}

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DOI: 10.1134/S1063774506030047

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