Suboxides:

The oxides contains more oxygen atoms as compare to central atoms and according to valency requirements of central atoms number of oxygen atoms are not sufficient.

For examples B₂O₃, C₃O₂, C₁₂O₉, Pb₃O, Rb₉O₂, Cs₁₁O₃ etc. 

Mixed Oxides:

The oxides in which oxidation state of oxygen atom is found to be it's uncommon oxidation state on central atom. Mixed oxides on dissolving in water undergo "disproportionation" 

For examples B₂O₃, ClO₂, Cl₂O₇ , N₂O_{5 ,} As₂O₄ etc.

Related Questions:

Which oxides (Anhydrides) gives two Oxyacids in water ?

What are the structural difference between oxides ( P4O6 and P4O10) of phosphorous?

What are common structural features of oxides (P4O6 and P4O5) of phosphorous?

Why Nitrogen dioxide (NO2) dimerises to form Dinitrogen tetraoxide (N2O4)?

Why Nitrogen dioxide (NO2) is coloured but Dinitrogen tetraoxide (N2O4) is colourless?

What is product obtained when N2O5 is treated with NaCl?

What are Nature of the alkali metal oxides(O-2), peroxides (O2-2) and superoxides (O-1/2) in hydrolysis reactions?

What are the SESQUI OXIDES ? give the examples.

Which is more basic oxide ion (O-2 ) or hydroxide ion( OH- ) and why ?

Perovskite Oxides:

ABO₃ type Oxides are also called Perovskite for examples CaTiO₃  And BaTiO₃.

Sesqui Oxides

The oxides in which number of oxygen atoms pet central atoms is found to be 3/2 .And it may be ionic, covalent or missed oxides.Mostly M₂O₃ type Oxides (Corundum structure) are sesqui Oxides.  Where M⁺²= Al, Ga, Ti, V, Cr, Fe, The etc.

Examples , B₂O₃, N₂O₃, Al₂O₃ ( covalent oxide) Fe₂O₃ (ionic oxide) Pb₂O₃ (mixed oxide)

Super Oxides

The oxides in which oxidati state of oxygen atom always -1/2, and super oxides are always ionic and paramagnetic.

For examples KO₂ , PbO₂, (NH₄)O₂ etc.

KO₂ => k+[O-O]-. Have following character

Bond pair -2

Lone pair -2

Hybri- sp2, linear non planner and bond angle not applicable.