Dehydroxylation and transformations of the 2 : 1 phyllosilicate pyrophyllite at elevated temperatures: An infrared spectroscopic study

	Dehydroxylation and transformations of the 2 : 1 phyllosilicate pyrophyllite at elevated temperatures: An infrared spectroscopic study
	Wang, L ; Zhang, M ; Redfern, SAT ; Zhang, ZY
刊名	CLAYS AND CLAY MINERALS
	2002-04-01
卷号	50 期号:2 页码:272-283
关键词	cristobalite dehydroxylation IR spectroscopy intermediate phase mullite pyrophyllite dehydroxylate transformation
ISSN号	0009-8604
文献子类	Article
英文摘要	The thermally-induced dehydroxylation and transformations of the 2:1 phyllositicate pyrophyllite have been studied using infrared spectroscopy in the frequency range 350 11000 cm(-1) and the temperature range 200-1500degreesC. The dehydroxylation of pyrophyllite to pyrophyllite dehydroxylate occurs between 500 and 900degreesC. It is characterized by a decrease in the intensity of the OH signals and phonon bands of pyrophyllite and the eventual disappearance of these features as well as the appearance of extra signals related to pyrophyllite dehydroxylate and an intermediate phase. Our results are consistent with previous observations that the SiO4 tetrahedral sheet structure still exists in pyrophyllite dehydroxylate, that the Si-O-Al linkages and 2:1 structure remain in the pyrophyllite dehydroxylate, and that AlO5 trigonal bipyramids form.
WOS关键词	SOLID-STATE AL-27 ; LAYER SILICATES ; SI-29 ; MONTMORILLONITE ; NMR
WOS研究方向	Chemistry ; Geology ; Mineralogy ; Agriculture
语种	英语
出版者	CLAY MINERALS SOCIETY
WOS记录号	WOS:000175320200013
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/77730]
专题	中国科学院地质与地球物理研究所
通讯作者	Wang, L
作者单位	1.Chinese Acad Sci, Changsha Inst Geotecton, Changsha 410013, Peoples R China 2.Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 1000029, Peoples R China
推荐引用方式 GB/T 7714	Wang, L,Zhang, M,Redfern, SAT,et al. Dehydroxylation and transformations of the 2 : 1 phyllosilicate pyrophyllite at elevated temperatures: An infrared spectroscopic study[J]. CLAYS AND CLAY MINERALS,2002,50(2):272-283.
APA	Wang, L,Zhang, M,Redfern, SAT,&Zhang, ZY.(2002).Dehydroxylation and transformations of the 2 : 1 phyllosilicate pyrophyllite at elevated temperatures: An infrared spectroscopic study.CLAYS AND CLAY MINERALS,50(2),272-283.
MLA	Wang, L,et al."Dehydroxylation and transformations of the 2 : 1 phyllosilicate pyrophyllite at elevated temperatures: An infrared spectroscopic study".CLAYS AND CLAY MINERALS 50.2(2002):272-283.