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Usually people discuss only pressure dependent phase transformations in case of either tin dioxide or titanium dioxide. It would be nice if someone gave the phase diagram for tin dioxide.

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  • $\begingroup$ If your institution has access, the ASM Alloy Phase Diagram Database is the place to start (asminternational.org). None of the O-Sn diagrams (all at standard pressure) indicate a phase transition. $\endgroup$ – Jon Custer Aug 2 '16 at 12:19
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Anatase and rutile phases form in $\ce{TiO2},$ the presence of cationic dopants or impurities significantly affect the transformation kinetics and phase stability [1]. It should be noted that anatase is metastable at all temperatures and pressures.

References

  1. Hanaor, D. A. H.; Sorrell, C. C. Review of the Anatase to Rutile Phase Transformation. J Mater Sci 2011, 46 (4), 855–874. https://doi.org/10/ct79p8.
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