Abstract
The position of the titanomagnetite subsolidus stability field boundaries, within the Fe-Ti-O ternary, above 1,000° C, has been calculated from chemical equilibrium considerations, using experimental data for the calibrated buffers of end member compositions. The relationship between chemical composition and intrinsic oxygen fugacity, within the single phase spinel field, has been investigated with a Frenkel cation point defect model. With this calculation scheme, conditions for departure from strict metal-oxygen stoichiometry to stable cation rich or deficient phases can be predicted.
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Aragón, R., McCallister, R.H. Phase and point defect equilibria in the titanomagnetite solid solution. Phys Chem Minerals 8, 112–120 (1982). https://doi.org/10.1007/BF00311281
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DOI: https://doi.org/10.1007/BF00311281