Pressure-induced phase transformations of PbCO3 by X-ray diffraction and   Raman spectroscopy

doi:10.1080/08957959.2015.1118475

CORC > 北京大学 > 地球与空间科学学院

	Pressure-induced phase transformations of PbCO3 by X-ray diffraction and Raman spectroscopy
	Gao, Jing ; Wu, Xiang ; Qin, Shan ; Li, Yan-chun
刊名	HIGH PRESSURE RESEARCH
	2016
关键词	transformation mechanism Raman spectroscopy diamond anvil cell PbCO3 X-ray diffraction POST-ARAGONITE PHASE EQUATION-OF-STATE CRYSTAL-STRUCTURE HIGH-TEMPERATURE EARTHS MANTLE CACO3 CARBON DOLOMITE BACO3 STABILITY
DOI	10.1080/08957959.2015.1118475
英文摘要	By employing synchrotron radiation, X-ray diffraction and Raman spectroscopy, the high pressure structural transformations of lead carbonate PbCO3 was investigated in diamond anvil cells up to similar to 50 GPa at room temperature. Three pressure-induced transitions have been observed at similar to 8.5, similar to 15 and similar to 26 GPa, respectively. The transition from PbCO3-I to PbCO3-II is a displacive transformation featured with anti-rotation of [CO3](2-) triangles. PbCO3-II is a metastable phase because the [CO3](2-) groups are in a unfixed state until they reach the equilibrium positions in PbCO3-III. PbCO3-III adopts a monoclinic symmetry with primitive lattice, and tendentiously exhibits a more compressible b-axis relative to c-axis. Isothermal pressure-volume relationship of PbCO3-III is well described by the Birch-Murnaghan equation of state with K-0 = 131(4) GPa, [GRAPHICS] (fixed) and V-0 = 246(1) angstrom(3). However, little information on the crystal structure of PbCO3-IV can be extracted from the present experiment. The transformation process of PbCO3 exhibits similarity to that of calcite and dolomite.; Natural Science Foundation of China [41473056, U1232204]; SCI(E); EI; ARTICLE; xiang.wu@pku.edu.cn; 1; 1-15; 36
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/437854]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Gao, Jing,Wu, Xiang,Qin, Shan,et al. Pressure-induced phase transformations of PbCO3 by X-ray diffraction and Raman spectroscopy[J]. HIGH PRESSURE RESEARCH,2016.
APA	Gao, Jing,Wu, Xiang,Qin, Shan,&Li, Yan-chun.(2016).Pressure-induced phase transformations of PbCO3 by X-ray diffraction and Raman spectroscopy.HIGH PRESSURE RESEARCH.
MLA	Gao, Jing,et al."Pressure-induced phase transformations of PbCO3 by X-ray diffraction and Raman spectroscopy".HIGH PRESSURE RESEARCH (2016).