...
【24h】

Formation of Stable Compounds of Potassium and Iron under Pressure

机译:在压力下形成稳定的钾和铁化合物

获取原文
获取原文并翻译 | 示例
           

摘要

We predict stable stoichiometric potassium-iron (K-Fe) intermetallic compounds at high pressures from first principles. Thermodynamic stability, crystal structures, and bonding properties of these compounds are also investigated. The dynamic stability of the predicted structures is established through phonon calculations while mechanical stability is established through Born-Huang stability criteria. Our results reveal that potassium and iron can form intermetallic compounds that are stabilized by high pressure and energy reordering of atomic orbital through electron transfer. A K-rich K-Fe compound is predicted to undergo structural phase transformations under pressure where clustering of K atoms is observed to precede transformation into the Fe-rich phase above 120 GPa. The elastic velocities and the densities predicted for various K-Fe compounds suggest that they may explain a potassium-containing Earth's core.
机译:我们从第一个原理预测高压下的稳定化学计量钾 - 铁(K-FE)金属间化合物。 还研究了这些化合物的热力学稳定性,晶体结构和粘合性质。 通过声子计算建立了预测结构的动态稳定性,而通过出生 - 黄稳定标准建立了机械稳定性。 我们的结果表明,钾和铁可以形成通过电子转移通过高压和原子轨道能量重新排序稳定的金属间化合物。 预计K-富k-Fe化合物将在受到K原子的压力下进行结构相变,以便在120gPa以上的转化中之前转化为Fe富含的相。 各种K-Fe化合物预测的弹性速度和密度表明它们可以解释含钾的地球核心。

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