Could anyone explain the bonding character of wurtzite ZnO? I think it possesses both covalent and ionic characters. Is there a relationship between bond type and forbidden band gap?
Yes indeed, as many compounds with transition metals do. Also, there is a close relationship between the bond type and band gap as much as it influences the band structure by the repulsive-attractive interactions between nuclei and electrons. I attach a reference where the bonding type in doped Cu2O is studied with inference on the electronic structure of the final material. Also references about ab initio calculations on ZnO band structure can be of help for you. Also try solid state books such as Kittel
if we compare the electronegativity values of oxygen and zinc (according to Pauling's scale, for example), their difference is 1.79 (=3.44-1.65). It is rather close to the arbitary boundary between covalent ( 2) bond type.
As I understand, there is a mixture of ionic and covalent bonds between Zn and O. Is this means that coordination bonds are excluded?
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Material Characterization