Honl-London Factors for Formula Systems

Hönl-London factors are given for and $$^3{\Phi}-^3{\Delta}\,\text{and}\,^3{\Delta}-^3{\Phi}$$ systems. Three coupling cases are considered (i) both states are intermediate between Hund's cases (a) and (b); (ii) both states are case (a); (iii) both states are case (b).