i**g
发帖数: 5 | 1 为什么碳的稳定结构是石墨的层状，而Si,Ge得 稳定结构都是金刚石类型?
大虾帮忙!THANKS A LOT! | d*****s
发帖数: 313 | 2 I think the determining factor here is how atoms pack together.
Remember that Carbon forms tetrahedral structure, i.e. diamond
while also forms graphite. The reason, chemically speaking, is
carbon atoms in diamond is sp3 hybridized while in graphite is
sp2 hybridized, therefore the interaction is stronger in the
diamond case.
【在 i**g 的大作中提到】
: 为什么碳的稳定结构是石墨的层状，而Si,Ge得 稳定结构都是金刚石类型?
: 大虾帮忙!THANKS A LOT!
| w****o
发帖数: 20 | 3 The main atomic difference between C and other group IV elements is that C has
no inner shell (except 1s2 which is spherical and extremely tightly bound),
but for Si and Ge they have bigger inner shells. When valence electrons
(s2+p2) hybridize to form either sp2 or sp3 structures, the inner shell
electrons will have an effect, serving as a perturbation to bridge/facilitate
the outer-shell hybridization (the diagonal element in the Hamiltonian
matrix). So for Si and Ge, sp3 hybridization is ener
【在 i**g 的大作中提到】
: 为什么碳的稳定结构是石墨的层状，而Si,Ge得 稳定结构都是金刚石类型?
: 大虾帮忙!THANKS A LOT!
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