It first releases its water to form anhydrous plutonium(IV) sulfate, then releases sulfur oxides to form plutonium(IV) oxide.
[3][2] At normal temperatures, however, plutonium(IV) sulfate tetrahydrate is stable in air, even at high humidity.
[5][7] Plutonium(IV) sulfate tetrahydrate ligands are monodentate, with bonds between plutonium atoms and oxygen atoms in the water and sulfate molecules.
The two forms share the same molecular geometry, but differ in the functional nature of the hydrogen bonds.
[4] Plutonium(IV) sulfate is a highly dangerous compound, due to it being radioactive and carcinogenic.