大学化学 >> 2015, Vol. 30 >> Issue (3): 85-87.doi: 10.3866/pku.DXHX2010385

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碳元素同素异形体的稳定性

邓耿, 尉志武   

  1. 清华大学化学系 北京 100084
  • 发布日期:2015-06-25
  • 通讯作者: 尉志武 E-mail:yuzhw@mail.tsinghua.edu.cn

The Stability of Carbon Allotropes

Deng Geng, Yu Zhiwu   

  1. Department of Chemistry, Tsinghua University, Beijing 100084, China
  • Published:2015-06-25

摘要:

碳元素有多种同素异形体,其稳定性可根据能量判据进行判断。一般认为,石墨是标准状况下碳元素最稳定的同素异形体,其标准摩尔生成焓被定为参考值0kJ/mol。近来亦有研究说明金刚石在0K下更稳定。一些文献认为富勒烯比石墨更稳定的说法是错误的,应予纠正。

关键词: 碳元素, 同素异形体, 稳定性, 生成焓

Abstract:

There are several allotropes of carbon and their stability can be judged by energy criterion. Of the most common allotropes, graphite is the most stable under the standard condition, and its standard molar enthalpy of formation is taken as the reference value 0kJ/mol in physical chemistry. Recently, some researchers reported that diamond would be more stable than graphite at 0K. It should also be stressed that the claim that fullerene is more stable than graphite is wrong.

Key words: Carbon, Allotrope, Stability, Enthalpy of formation

MSC2000: 

  • O6