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High-Resolution Electron Microscopy of Olivine-Magnetite Interfaces.

  • Stuart Mckernan (a1) and C. Barry Carter (a1)

Abstract

In the oxidation of iron-rich olivine (Mg,Fe)2SiO4 at elevated temperatures interfaces between olivine and the magnetite spinel (Fe3O4) are formed. The orientation relation between these structures is such that the planar spacing for the principal low index planes are very closely matched in the two materials. Regions of different contrast are observed in the olivine up to 5–10 nm from the interface. It is proposed that this contrast is due to enhanced iron concentration in this region caused by the strain field around the magnetite precipitates.

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References

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Champness, P. E., Mineral. Mag. 37, 790 (1970).
2. Kohlstedt, D. L. and Vander Sande, L. B., Contrib. Mineral. Petrol. 53, 13 (1975).
3. Carter, C. B., Ber. Bunsenges. Phys. Chem. 90, 643 (1986).
4. McKernan, S., Rasmussen, D.R. and Carter, C.B., Proc. Mat. Res. Symp. Proc. 139, p. 309, (1989)

High-Resolution Electron Microscopy of Olivine-Magnetite Interfaces.

  • Stuart Mckernan (a1) and C. Barry Carter (a1)

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