For the same metal,the same ligands and metal ligand distances it can be shown that delta t= delta - Chemistry - Coordination Compounds

Question

For the same metal,the same ligands and metal ligand distances it can be shown that t=*4/9 what does this means?

Kirti Gogia · Accepted Answer

This line has been used in reference to crystal field splitting
energy in a tetrahedral field The coordination number of the
central metal atom in a tetrahedral field is 4, while that in an
octahedral field is 6 Thus, if we compare a tetrahedral complex and
an octahedral complex in which
1) the central metal atoms are the same
2) the ligands around the central metal atom are the same
3) the distance between the metal and ligand is the same
then we will find that the crystal field splitting energy of a
tetrahedral field is (4 / 9) times that of an octahedral field

For the same metal,the same ligands and metal ligand distances it can be shown that <delta>t=<delta>*4/9...what does this means?