A new cubic perovskite in PbGeO3 at high pressures
文献类型：期刊论文
| 作者 | Xiao, WS; Tan, DY; Zhou, W; Chen, M; Xiong, XL; Song, MS; Liu, J; Ma, HK; Xu, J; Liu J(刘景)
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| 刊名 | AMERICAN MINERALOGIST
 |
| 出版日期 | 2012 |
| 卷号 | 97期号:7页码:1193-1198 |
| 关键词 | Lead germanate cubic perovskite high pressure amorphization |
| 英文摘要 | A new cubic perovskite polymorph of PbGeO3 (Phase II) was synthesized by laser heating in the diamond-anvil cell (DAC) at the pressure of 36 GPa. Fitting the Birch-Murnaghan equation of state against its observed P-V data yields a bulk modulus K-0 of 196(6) GPa and the volume V-0 of 56.70(13) angstrom(3) when K-0' is assumed being 4. After the pressure is released, the PbGeO3 Phase II changes gradually into an amorphous phase, which contains mainly fourfold-coordinated germanium. It indicates that the PbGeO3 Phase II with a GeO6 octahedron framework transforms to a GeO4 tetrahedron network during the amorphization. The existence of PbGeO3 cubic perovskite Phase II at high pressures indicates that the polarized character of the Pb2+ ion induced by its 6s(2) lone pair electrons would be totally reduced in the environment of major silicate perovskites inside the lower mantle, and thus the Pb atom would substitute the Ca atom to enter the CaSiO3 perovskite. |
| 学科主题 | Geochemistry & Geophysics; Mineralogy |
| 收录类别 | SCI |
| WOS记录号 | WOS:000306150600017 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/224114]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 推荐引用方式 GB/T 7714 | Xiao, WS,Tan, DY,Zhou, W,et al. A new cubic perovskite in PbGeO3 at high pressures[J]. AMERICAN MINERALOGIST,2012,97(7):1193-1198. |
| APA | Xiao, WS.,Tan, DY.,Zhou, W.,Chen, M.,Xiong, XL.,...&刘景.(2012).A new cubic perovskite in PbGeO3 at high pressures.AMERICAN MINERALOGIST,97(7),1193-1198. |
| MLA | Xiao, WS,et al."A new cubic perovskite in PbGeO3 at high pressures".AMERICAN MINERALOGIST 97.7(2012):1193-1198. |
入库方式： OAI收割
来源：高能物理研究所
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