Discovery of a hexagonal ultradense hydrous phase in (Fe,Al)OOH

doi:10.1073/pnas.1720510115

GSTDTAP > 地球科学

DOI	10.1073/pnas.1720510115
	Discovery of a hexagonal ultradense hydrous phase in (Fe,Al)OOH
	Zhang, Li 1; Yuan, Hongsheng 1; Meng, Yue 2; Mao, Ho-Kwang 1,3
	2018-03-20
发表期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN	0027-8424
出版年	2018
卷号	115 期号:12 页码:2908-2911
文章类型	Article
语种	英语
国家	Peoples R China; USA
英文摘要	A deep lower-mantle (DLM) water reservoir depends on availability of hydrous minerals which can store and transport water into the DLM without dehydration. Recent discoveries found hydrous phases AlOOH (Z = 2) with a CaCl2-type structure and FeOOH (Z = 4) with a cubic pyrite-type structure stable under the high-pressure-temperature (P-T) conditions of the DLM. Our experiments at 107-136 GPa and 2,400 K have further demonstrated that (Fe, Al) OOH is stabilized in a hexagonal lattice. By combining powder X-ray-diffraction techniques with multigrain indexation, we are able to determine this hexagonal hydrous phase with a = 10.5803(6) angstrom and c = 2.5897(3) angstrom at 110 GPa. Hexagonal (Fe, Al) OOH can transform to the cubic pyrite structure at low T with the same density. The hexagonal phase can be formed when delta-AlOOH incorporates FeOOH produced by reaction between water and Fe, which may store a substantial quantity of water in the DLM.
英文关键词	X-ray diffraction hydrous mineral lower mantle deep-water cycle
领域	地球科学 ; 气候变化 ; 资源环境
收录类别	SCI-E
WOS记录号	WOS:000427829500045
WOS关键词	HIGH-PRESSURE ; DELTA-ALOOH ; WATER TRANSPORT ; EARTHS ; STABILITY ; DIFFRACTION ; TRANSITION ; SILICATE ; IRON ; GPA
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/204881
专题	地球科学资源环境科学气候变化
作者单位	1.Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China; 2.Carnegie Inst Sci, Geophys Lab, High Pressure Collaborat Access Team, Argonne, IL 60439 USA; 3.Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA
推荐引用方式 GB/T 7714	Zhang, Li,Yuan, Hongsheng,Meng, Yue,et al. Discovery of a hexagonal ultradense hydrous phase in (Fe,Al)OOH[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(12):2908-2911.
APA	Zhang, Li,Yuan, Hongsheng,Meng, Yue,&Mao, Ho-Kwang.(2018).Discovery of a hexagonal ultradense hydrous phase in (Fe,Al)OOH.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(12),2908-2911.
MLA	Zhang, Li,et al."Discovery of a hexagonal ultradense hydrous phase in (Fe,Al)OOH".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.12(2018):2908-2911.