[Pw_forum] Valence state identification

[Liwei Geng]

Dear all, 



I've done the scf calculation using atom pseudopotential files, but I can't 
know their valence state. Could?you tell me how to identify the valence state 
of each ion in?BaTiO3 using QE? Say, how can I know that the Ba is Ba2+ or O is 
O2-? 



Thanks, 

Liwei 
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