(alpha-PbO2-type nanophase of TiO2 from coesite-bearing eclogite in the Dabie Mountains, China

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	(alpha-PbO2-type nanophase of TiO2 from coesite-bearing eclogite in the Dabie Mountains, China
	X. L. Wu; D. W. Meng; Y. J. Han
	2005
发表期刊	American Mineralogist
ISSN	0003-004X
卷号	90 期号:8-9 页码:1458-1461
摘要	A natural high-pressure phase of titanium oxide with alpha-PbO2-structure has been found in omphacite from coesite-bearing eclogite at Shima in the Dabie Mountains, China. High-resolution transmission electron microscope observations have revealed an orthorhombic lattice, corresponding to alpha-PbO2-type TiO2, with cell parameters a = 0.461 nm, b = 0.540 nm, c = 0.497 nm and space group Pbcn. It occurs as nanometer-thick (< 2 nm) lamellae between multiple twinned rutile crystals, providing additional evidence of very high-pressure, metamorphism at 7 GPa, 900 degrees C. This implies subduction of continental material to a depth of more than 200 kilometers. alpha-PbO-type TiO2 could be an extremely useful index mineral for ultrahigh-pressure.
部门归属	china univ geosci, testing ctr, wuhan 430074, peoples r china. china univ geosci, fac earth sci, wuhan 430074, peoples r china. acad sinica, inst met res, atom imaging solids lab, shenyang 110015, peoples r china.;wu, xl (reprint author), china univ geosci, testing ctr, wuhan 430074, peoples r china;dwmeng@cug.edu.cn
关键词	High-pressure Phase Ries Crater Rutile Polymorph Titanium
URL	查看原文
WOS记录号	WOS:000231412500025
引用统计	被引频次：43[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35138
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. L. Wu,D. W. Meng,Y. J. Han. (alpha-PbO2-type nanophase of TiO2 from coesite-bearing eclogite in the Dabie Mountains, China[J]. American Mineralogist,2005,90(8-9):1458-1461.
APA	X. L. Wu,D. W. Meng,&Y. J. Han.(2005).(alpha-PbO2-type nanophase of TiO2 from coesite-bearing eclogite in the Dabie Mountains, China.American Mineralogist,90(8-9),1458-1461.
MLA	X. L. Wu,et al."(alpha-PbO2-type nanophase of TiO2 from coesite-bearing eclogite in the Dabie Mountains, China".American Mineralogist 90.8-9(2005):1458-1461.