Lattice dynamics of NiTiO3 under high pressure: Raman evidence under two pressure-transmitting mediums
Lattice dynamics of NiTiO3 under high pressure: Raman evidence under two pressure-transmitting mediums
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DOI：
10.1016/j.rinp.2022.106114
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发表时间：
2022-12
影响因子：
5.3
通讯作者：
Wenming Qi;Abliz Mattursun;Min Gao;A. Hushur;Hongyan Zhang
中科院分区：
文献类型：
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作者：
Wenming Qi;Abliz Mattursun;Min Gao;A. Hushur;Hongyan Zhang
用拉曼光谱研究了钛铁矿相NiTiO_3在静水压和非静水压下的变化。这种菱面体结构在35 Gpa以下不发生相变，但在45 Gpa的非静压下发现了这种相变的证据。文中将详细讨论不同模式下的压力演化。我们的发现不仅为流体静力和非流体静力条件下NiTiO_3晶格的差异提供了直接的实验证据，而且为理解地球深部钛铁矿矿物的相稳定区域提供了新的视角。
Ilmenite-type NiTiO3has been studied by Raman spectroscopy under hydrostatic and non-hydrostatic pressure. The rhombohedral structure does not undergo phase transitions up to 35 GPa but evidence of it is found under non-hydrostatic pressure at 45 GPa. The pressure evolution of different modes will be discussed in detail. Our findings not only provide direct experimental evidence of difference in the lattice of NiTiO3between hydrostatic and non-hydrostatic conditions, but also offer a new insight to understand the phase stability region of ilmenite minerals in the deep earth.