“Davemaoite” forms under the high-pressure conditions of deep Earth. ScienceMagArchives
reports. The newly discovered calcium silicate perovskite, dubbed “davemaoite” after a high-pressure geophysicist, is thought to compose up to 7% of Earth’s lower mantle, a region of crushing pressure and heat.
The mineral has been formed briefly in lab experiments, but its crystals immediately rearrange when scientists reduce pressure to atmospheric levels. The diamond’s rigid structure. That helped them confirm not only its existence, but also its propensity for trapping certain radioactive elements, such as uranium and potassium, thought to heat the lower mantle.
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