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Spinel Formation by Heating Haematite in Air and Water Vapour

Nature Physical Science volume 239, pages 151–152 (1972)Cite this article

Abstract

CHANGES in magnetic properties during heating are important in the identification of minerals in many magnetic and petrologic studies. Because haematite is an important mineral to physicists, geologists, and palaeomagnetists, its equilibrium stability field has been well studied1−3 and it is generally believed that haematite is stable in air to heating to temperatures well above its Neél point. Our experiments indicate that when water is present, haematite can form a strongly magnetic spinel in air temperatures as low as 300° C.

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Author notes

  1. H. KINOSHITA

    Present address: Geophysical Institute, University of Tokyo, Tokyo, Japan

Authors and Affiliations

  1. Geophysics Program and Department of Oceanography, University of Washington, Seattle, Washington, 98195

    H. P. JOHNSON, H. KINOSHITA & R. T. MERRILL

Authors
  1. H. P. JOHNSON
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  2. H. KINOSHITA
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  3. R. T. MERRILL
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JOHNSON, H., KINOSHITA, H. & MERRILL, R. Spinel Formation by Heating Haematite in Air and Water Vapour. Nature Physical Science 239, 151–152 (1972). https://doi.org/10.1038/physci239151a0

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  • DOI: https://doi.org/10.1038/physci239151a0

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