Calcium silicate perovskite, CaSiO₃, is arguably the most geochemically important phase in the lower mantle, because it concentrates elements that are incompatible in the upper mantle, including the heat-generating elements thorium and uranium, which have half-lives longer than the geologic history of Earth. We report CaSiO₃-perovskite as an approved mineral (IMA2020-012a) with the name davemaoite. The natural specimen of davemaoite proves the existence of compositional heterogeneity within the lower mantle. Our observations indicate that davemaoite also hosts potassium in addition to uranium and thorium in its structure. Hence, the regional and global abundances of davemaoite influence the heat budget of the deep mantle, where the mineral is thermodynamically stable.

中文翻译：

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从下地幔中发现达维茂石，CaSiO3-钙钛矿

硅酸钙钙钛矿 CaSiO ₃可以说是下地幔中最重要的地球化学相，因为它浓缩了上地幔中不相容的元素，包括发热元素钍和铀，它们的半衰期比地质元素长。地球的历史。我们将 CaSiO ₃ -钙钛矿报告为经批准的矿物 (IMA2020-012a)，名称为 davemaoite。达维茂岩天然标本证明了下地幔内部存在成分异质性。我们的观察表明，davemaoite 在其结构中除了含有铀和钍外，还含有钾。因此，达维茂石的区域和全球丰度影响了深部地幔的热收支，该矿物在热力学上是稳定的。