Relativistic potential expressions in open-shell SCF calculations

It is shown that in relativistic SCF calculations for atomic systems with open shells close to LS coupling it is often desirable to construct the potential expressions for the orbital wavefunctions on the basis of a relativistically formulated LS term. Especially if one considers differences between one-electron properties calculated for the J=l+or- 1 / 2 functions of the open shell, the commonly used averaging techniques often lead to exaggerated relativistic effects.