Low-temperature oxidation of synthetic Al- and Mg-doped titanomagnetites

Details Low-temperature oxidation of synthetic Al- and Mg-doped titanomagnetites Low-temperature oxidation of synthetic Al- and Mg-doped titanomagnetites

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pepi...30..330p&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 30, Issue 4, p. 330-330.

Physics

Scientific paper

Al- and Mg-doped titanomagnetites were synthesized at 1300°C using the gas-mixing technique. A composition, representative of average natural titanomagnetites in ocean floor basalts, was sought.
The samples were ball-milled in acetone to average grain sizes of 0.5 μm and 5 μm and the material was then oxidised, in air, at temperatures below 300°C. This procedure formed titanomaghemite, a cation-deficient titanomagnetite.
Low-temperature oxidation is described as the diffusion of Fe-ions out of the spinel lattice and the process is observed to be distinctly dependent upon grain size.

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