* Lead has multiple oxidation states: Lead can exist in various oxidation states, the most common being +2 and +4.

* Mixed oxidation states in Pb4O3: In Pb4O3, lead exists in both +2 and +4 oxidation states.

* Structure: The structure of Pb4O3 can be represented as Pb²⁺(Pb⁴⁺O3)², suggesting that it consists of lead(II) ions and a complex anion containing lead(IV) in the form of (Pb⁴⁺O3)²⁻.

Therefore, while Pb4O3 contains lead in both +2 and +4 oxidation states, it does not contain isolated Lead(IV) ions (Pb⁴⁺).