The q l parameters can also capture the degree of spherical asymmetry, which differ from the reference models, as shown in Table . The q 4 and q 5 parameters in three La The symmetry parameters (I ω , q l , and V n ) for the coordination structure in crystalline LaBO 3 were almost equivalent to those for a-La50 glass; however, the volume occupied by the RE expected from I iso and V vol was reduced in comparison to a-La50 glass. This is associated with the difference in the effect of packing on polyhedral coordination structures in ordered and disordered systems.