Hello I was researching a little about term symbols of lanthanides and transition metals and have got two questions.

It is known that lanthanides don’t follow LS-coupling, but instead JJ-coupling. Does that mean that the term symbols for the rare earth (III) cations in the famous Diecke diagram are formed by JJ-coupling? I am asking because the ground state term symbols for lanthanides are found just like the transition metal ground states:

enter image description here

My second question is the following: In the term schemes for transition and lanthanide metals, all filled shells and subshells are discarded, so we are only looking at d-d-transitions and f-f-transitions of their respective term symbols if I understood correctly.

But below the f- and d-orbitals there are other orbitals (for example 2s) which could also do electronic transitions (at much higher energies of course). How are they described?



Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.