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Pressure-induced phase transition of lead phosphate Pb-3(PO4)(2): X-ray diffraction and XANES
Qin, F; Wu, X; Zhai, SM; Qin, S; Yang, K; Chen, DL; Li, YC; xiang.wu@pku.edu.cn
2014
Source PublicationPHASE TRANSITIONS
ISSN0141-1594
Volume87Issue:12Pages:1255—1264
AbstractLead phosphate Pb-3(PO4)(2) was investigated by in situ synchrotron radiation X-ray diffraction and X-ray absorption near-edge structure (XANES) combined with diamond anvil cell technique up to 60.9 GPa. A pressure-induced phase transition of Pb-3(PO4)(2) was observed from monoclinic (C2/c) to trigonal ( [GRAPHICS] ) phases at about 1.7 GPa at room temperature. The high-pressure annealing experiment indicates that the trigonal phase of Pb-3(PO4)(2) is stable at least up to 60.9 GPa. Isothermal pressure-volume relationship of trigonal Pb-3(PO4)(2) is well described by the third-order Birch-Murnaghan equation of state with V-0 = 533(1) angstrom(3), K-0 = 89(4) GPa and K-0(') = 5.8(2). In trigonal Pb-3(PO4)(2), the a-axis is more compressible than the c-axis, showing an anisotropy elasticity. XANES results reveal the evolution of Pb local environment, i.e. the first-shell coordination number of Pb1 changes from 9 to 12 and the average Pb-O bond length increases at the crossover of C2/c-to- [GRAPHICS] phase transition.
KeywordTricalcium Phosphate Dense Polymorph 15 Gpa Gamma-ca-3(Po4)(2) Tuite Apatite Mantle Renormalization Ca3(Po4)2 Stability
Indexed BySCI
Language英语
WOS IDWOS:000346340900006
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14331
Collection中科院上海应用物理研究所2011-2019年
Corresponding Authorxiang.wu@pku.edu.cn
Recommended Citation
GB/T 7714
Qin, F,Wu, X,Zhai, SM,et al. Pressure-induced phase transition of lead phosphate Pb-3(PO4)(2): X-ray diffraction and XANES[J]. PHASE TRANSITIONS,2014,87(12):1255—1264.
APA Qin, F.,Wu, X.,Zhai, SM.,Qin, S.,Yang, K.,...&xiang.wu@pku.edu.cn.(2014).Pressure-induced phase transition of lead phosphate Pb-3(PO4)(2): X-ray diffraction and XANES.PHASE TRANSITIONS,87(12),1255—1264.
MLA Qin, F,et al."Pressure-induced phase transition of lead phosphate Pb-3(PO4)(2): X-ray diffraction and XANES".PHASE TRANSITIONS 87.12(2014):1255—1264.
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