首页> 外文会议>Fullerenes and Nanotubes: The Building Blocks of Next Generation Nanodevices: Fullorenes >BONDING NATURE AND STRUCTURAL PHASE TRANSITION IN RARE EARTH DOPED FULLERIDES
【24h】

BONDING NATURE AND STRUCTURAL PHASE TRANSITION IN RARE EARTH DOPED FULLERIDES

机译:稀土掺杂全卤化物的键合性质和结构相变

获取原文
获取原文并翻译 | 示例

摘要

The bonding nature and structural phase transition in rare earth doped fullerides has been investigated. The Maximum entropy method (MEM) based on the Rietveld analysis was performed on the synchrotron x-ray diffraction pattern of nominal Sm_3C_(70) to estimate the electron density distribution (EDD). The estimated EDD of Sm_3C_(70) unambiguously demonstrated a covalent Sm-C bond. The Sm bridges two C_(70) molecules, producing a C_(70)-Sm-C_(70) dimer structure. Furthermore, high-temperature and high-pressure x-ray diffraction experiments revealed that Sm_3C_(70) and Eu_3C_(70) undergo reversible first-order structural phase transitions at high pressure and high temperature. These features are ascribed to the unique bonding nature in rare-earth C_(70) compounds.
机译:研究了稀土掺杂富勒酸盐中的键合性质和结构相变。对标称Sm_3C_(70)的同步加速器X射线衍射图执行基于Rietveld分析的最大熵方法(MEM),以估算电子密度分布(EDD)。 Sm_3C_(70)的估计EDD明确显示出共价Sm-C键。 Sm桥接两个C_(70)分子,产生C_(70)-Sm-C_(70)二聚体结构。此外,高温高压x射线衍射实验表明,Sm_3C_(70)和Eu_3C_(70)在高压和高温下经历可逆的一阶结构相变。这些特征归因于稀土C_(70)化合物的独特键合性质。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号