Studies of the local lattice distortions for the various rhombic Ru3+ centres in AgX (XÂ =Â Cl and Br)

SHPs and local structures are theoretically studied for various rhombic Ru3+ centres in AgX. Local lattice distortions are analysed from influences of VAg for all centres in a consistent way. Ligand orbital and spin-orbit coupling contributions are included in view of covalency of the systems. Defect structures of centres A, A′ (a), B, B′ (b) and X, X′ (c) in AgX:Ru3+ (X = Cl and Br).40