High-pressure phase transitions and compressibilities of   aragonite-structure carbonates: SrCO3 and BaCO3

doi:10.1007/s00269-015-0740-2

CORC > 北京大学 > 地球与空间科学学院

	High-pressure phase transitions and compressibilities of aragonite-structure carbonates: SrCO3 and BaCO3
	Wang, Meili ; Liu, Qiong ; Nie, Shufang ; Li, Baosheng ; Wu, Ye ; Gao, Jing ; Wei, Xiaozhuo ; Wu, Xiang
刊名	PHYSICS AND CHEMISTRY OF MINERALS
	2015
关键词	SrCO3 BaCO3 High pressure Phase transitions Compressibilities MODULUS-VOLUME RELATIONSHIP X-RAY-DIFFRACTION CRYSTAL-STRUCTURE LOWER MANTLE CACO3 WITHERITE STRONTIANITE STABILITY STATE
DOI	10.1007/s00269-015-0740-2
英文摘要	The aragonite-structure carbonates-strontianite (SrCO3) and witherite (BaCO3)-were investigated by synchrotron X-ray diffraction combined with diamond anvil cells up to 30 and 15 GPa at room temperature, respectively. Phase transitions in SrCO3 (Pmcn to P2(1)2(1)2) and BaCO3 (Pmcn to Pmmn) were observed at 22.2-26.9 and 9.8-11.2 GPa, respectively. Both strontianite and witherite display anisotropic linear compression under pressure, with the c-axis 2-3 times more compressible than the a-axis and b-axis. The obtained second-order Birch-Murnaghan equation of state parameters for strontianite and witherite are V (0) = 258.4(3) a"<<(3), K (0) = 62(1) GPa; and V (0) = 304.8(3) a"<<(3), K (0) = 48(1) GPa, respectively. Based on the current results for strontianite and witherite and previous data for aragonite (CaCO3) and cerussite (PbCO3), the bulk moduli of the aragonite-structure carbonates exhibit a linear correlation with ambient molar volume [K (T0) (GPa) = 138 (5) - 2.0 (3) x V (0)], with V (0) in cm(3)/mol, and the aragonite-structure to post-aragonite-structure phase transition pressures increase with decreasing ionic radius of the cations.; National Natural Science Foundation of China [41020134003, 40972028]; SCI(E); EI; ARTICLE; qiong.liu@pku.edu.cn; 6; 517-527; 42
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/419809]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wang, Meili,Liu, Qiong,Nie, Shufang,et al. High-pressure phase transitions and compressibilities of aragonite-structure carbonates: SrCO3 and BaCO3[J]. PHYSICS AND CHEMISTRY OF MINERALS,2015.
APA	Wang, Meili.,Liu, Qiong.,Nie, Shufang.,Li, Baosheng.,Wu, Ye.,...&Wu, Xiang.(2015).High-pressure phase transitions and compressibilities of aragonite-structure carbonates: SrCO3 and BaCO3.PHYSICS AND CHEMISTRY OF MINERALS.
MLA	Wang, Meili,et al."High-pressure phase transitions and compressibilities of aragonite-structure carbonates: SrCO3 and BaCO3".PHYSICS AND CHEMISTRY OF MINERALS (2015).