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Double-crossed again

An idea that a mineral phase transition may occur not once, but twice, close to the core–mantle boundary has been tested with seismic data. The resulting picture of the deep Earth is sure to provoke debate.

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Figure 1: Perovskite (Pv) and post-perovskite (pPv) within Earth's lower mantle.


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Wysession, M., Solomatov, V. Double-crossed again. Nature 434, 834–835 (2005).

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