高温高压下方解石相转变的拉曼光谱原位实验研究

doi:10.3964/j.issn.1000-0593(2012)02-0378-05

CORC > 北京大学 > 地球与空间科学学院

	高温高压下方解石相转变的拉曼光谱原位实验研究; In situ experimental study of phase transition of calcite by Raman spectroscopy at high temperature and high pressure
	刘川江 ; 郑海飞
刊名	光谱学与光谱分析
	2012
关键词	高温高压方解石金刚石压腔拉曼光谱相变 High temperature and high pressure Calcite Diamond anvil cell Raman spectroscopy Phase transition
DOI	10.3964/j.issn.1000-0593(2012)02-0378-05
英文摘要	用热液金刚石压腔装置结合拉曼光谱技术研究了高温高压下方解石的相变过程及拉曼光谱特征。结果表明:常温条件下,体系压力增至1 666和2 127 MPa时,方解石的拉曼特征峰155cm-1消失,1 087cm-1峰分裂为1 083和1 090cm-1两个谱峰、282cm-1峰突然降至231cm-1,证明其转变为方解石-Ⅱ和方解石-Ⅲ。在起始压力为2 761MPa和低于171℃的升温过程中,方解石-Ⅲ的拉曼散射的各个特征振动峰没有变化。当温度达到171℃,方解石晶体完全变成不透明状,其对称伸缩振动峰1 087cm-1、面内弯曲振动峰713cm-1和晶格振动峰155和282cm-1均发生突变,说明方解...; The phase transitions of calcite at high temperature and high pressure were investigated by using hydrothermal diamond anvil cell combined with Raman spectroscopy. The result showed that the Raman peak of 155 cm(-1) disappeared, the peak of 1 087 cm(-1) splited into 1083 and 1 090 cm(-1) peaks and the peak of 282 cm(-1) abruptly reduced to 231 cm(-1) at ambient temperature when the system pressure increased to 1 666 and 2 127 MPa respectively, which proved that calcite transformed to calcite-II and calcite-III. In the heating process at the initial pressure of 2 761 MPa and below 171 degrees C, there was no change in Raman characteristic peaks of calcite-III. As the temperature increased to 171 degrees C, the color of calcite crystal became opaque completely and the symmetric stretching vibration peak of 1 087 cm(-1), in-plane bending vibration peak of 713 cm(-1) and lattice vibration peaks of 155 and 282 cm(-1) began to mutate, showing that the calcite-III transformed to a new phase of calcium carbonate at the moment. When the temperature dropped to room temperature, this new phase remained stable all along. It also indicated that the process of phase transformation from calcite to the new phase of calcium carbonate was irreversible. The equation of phase transition between calcite-III and new phase of calcium carbonate can be determined by P(MPa) = 9.09T x (degrees C) +1 880. The slopes of the Raman peak (v1 087) of symmetrical stretching vibration depending on pressure and temperature are dv/dP = 5.1 (cm(-1) x GPa(-1)) and dv/dT = -0.055 3(cm(-1) x degrees C(-1)), respectively.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000299606500020&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); EI; PubMed; 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 0; 02; 378-382; 32
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/170379]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	刘川江,郑海飞. 高温高压下方解石相转变的拉曼光谱原位实验研究, In situ experimental study of phase transition of calcite by Raman spectroscopy at high temperature and high pressure[J]. 光谱学与光谱分析,2012.
APA	刘川江,&郑海飞.(2012).高温高压下方解石相转变的拉曼光谱原位实验研究.光谱学与光谱分析.
MLA	刘川江,et al."高温高压下方解石相转变的拉曼光谱原位实验研究".光谱学与光谱分析 (2012).