Mineral assemblage in the deep interior of the giant planet investigated by the high pressure and temperature phase transition in titanate

超级地球等巨行星内部深处的矿物组合是实验研究中具有挑战性的课题，因为这颗巨行星内部的实验可产生压力与实际压力之间存在显著差异。其中一种可行的方法是从模拟材料中获得一种方法，然后钛酸盐有望在低压下表现为硅酸盐的类似物。虽然长期以来的预期是ABO3型化合物在超高压下分解成AO+BO2组合，但目前的实验工作表明，2/3FeO+1/3FeTi3O7组合是最密集的，这一模型在这颗巨行星的更深部可能更稳定。

Mineral assemblage in the deep interior of the giant planet such as Super Earth is the challenging subject for the experimental study because of the significant difference between experimentally producible pressure and real pressure at the interior of the giant planet. One of the plausible ways is an approach from the analogue material, and then titanate is expected to behave as analogue of silicate even at low pressure. Although the long-held expectation was the decomposition of ABO3-type compound into AO + BO2 assemblage at the ultrahigh pressure, present experimental work showed that 2/3FeO + 1/3FeTi3O7 assemblage is the densest and this model may be more stable at deeper interior of the giant planet.