Could Al/O Stoichiometries Beyond Al2O3 Exist?

[only1892]

Hi,
I am doing some simulation and get a new structure and the stoichiometry is Al/O=1/1,not Al2O3. I searched almost all the journals, but still can not find any reference talking about a stoichiometry rather than Al/O=2/3. Is there any theoretical evidence saying that 2:3 is the only correct one? I mean, like Fe, there are FeO,Fe2O3 and Fe3O4,possiblly more. But why only Al2O3?
If people have tried to find other stoichiometry, how was it?

 

[kanato]

A +1 ionization state for Al is surprising to me, since Al has 3 sp electrons. What kind of simulation are you doing that allows variable soichiometry?

 

[only1892]

Thanks for your reply.
In my simulation, there are extra Al atoms that allows to compensate the O and occupying all the tetrahedral sites of the O hcp sub-lattice.

A +1 ionization state for Al is surprising to me, since Al has 3 sp electrons. What kind of simulation are you doing that allows variable soichiometry?