Shape of Orbitals in Periodic Crystals: Hybridization and Energy Bands

[Sunset]

I asked myself how the orbitals in a solid look like.
Assume a crystal with a periodic structure, e.g. NaCl. The electrons in the crystal have energys according to the energy-band-model. Every band consists of that much discrete energy-levels that you might nearly call it continous. I know that molecules have hybrid orbitals. For example the H2-molecule has two spatially separated s-orbitals (bonding and anti-bonding), right? Does a crystal also have "hybrid orbitals", i.e. macroscopic orbitals which are as large as the crystal itself? Have the horribly much orbitals, which together build a band, the same shape? Has someone ever computed it for a periodic crystal-structure? I guess not...

Best regards

 

[Sunset]

Just thougt of a different picture:

Every nucleous in the solid has its own orbitals i.e. every nucleous contributes one energy-level to every band. But why, in a periodic structure, there are different energy-levels? In NaCl for example every nucleous "sees" the same "environment". Because of symmetry every Na should have the same energy-levels. So no continuous bands...

 

[Sunset]

Hey why thread closed??