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为什么石墨比金刚石更稳定

更新时间: 2020-09-23 00:00:00     

石墨和金刚石都属于碳单质,他们的化学性质完全相同。但金刚石和石墨不是同种物质,它们是由相同元素构成的同素异型体。从分子结构上说,石墨是过渡形的分子,而金刚石是正六面体的结构,因此金刚石的能量要比石墨的能量大,能量越大越不稳定。也可以用键能来解释,石墨之间的碳碳键键能较大,因而更稳定。

关键词: 为什么 石墨 金刚石 稳定

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