| The discovery of TiO2-Ⅱ,the α-PbO2-structured high-pressure polymorph of rutile,in the Suizhou L6 chondrite |
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| 作者姓名： | Xiande Xie Xiangping Gu Ming Chen |
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| 作者单位： | 1. Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Laboratory of Mineral Physics and Materials,Guangzhou Institute of Geochemistry, Chinese Academy of Sciences;2. School of Geosciences and Info-Physics, Central South University;3. State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences |
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| 摘 要： | We report the discovery of TiO2-Ⅱ in the unmelted rock of the shocked Suizhou L6 chondrite.Natural TiO2-Ⅱ was previously found in ultrahigh-pressure metamorphic and mantle-derived rocks,terrestrial impact structures,and tektite.Our microscopic,Raman spectroscopic,electron microprobe and transmission electron microscopic investigations have revealed:(1) All observed TiO2-Ⅱ grains are related with ilmenite and pyrophanite;(2) TiO2-Ⅱ occurs as needle-and ...
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