Except for AcPO 4, they are all similar to the corresponding lanthanum compounds and except for AcH 2, they all contain actinium in the oxidation state +3.
They are all similar to the corresponding lanthanum compounds. This is except for AcPO 4. They all contain actinium in the oxidation state +3. This is except for AcH 2. This is except for AcPO 4.