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Cation to anion stoichiometry of chromite: A new perspective

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Abstract

Ferric to ferrous ratios of a batch of chromite samples from the Bushveld Complex, South Africa, were measured to calculate the cation to oxygen stoichiometry per unit cell. Cation deficiency, due to post-magmatic oxidation of Fe2+ to Fe3+ is widespread. Oxidised chromite reduces more readily than unoxidised material and naturally occurring non-stoichiometric chromite is likely to be a more suitable feedstock for the ferro-alloys industry. This factor is often overlooked during routine mineralogical characterisations.

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Authors and Affiliations

  1. Mineralogy and Process Chemistry Division, Mintek, Private Bag X3015, Randburg, 2125, South Africa

    J. Nell

  2. Department of Physics, University of the Witwatersrand, Private Bag 3, Wits 2050, Johannesburg, South Africa

    H. Pollak

Authors
  1. J. Nell
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  2. H. Pollak
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Nell, J., Pollak, H. Cation to anion stoichiometry of chromite: A new perspective. Hyperfine Interactions 111, 309–312 (1998). https://doi.org/10.1023/A:1012686608151

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  • DOI: https://doi.org/10.1023/A:1012686608151

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