Crystal Field Splitting Parameters

The energy difference between splitted d-orbitals i.e. t_2g and e_g in octahedral field and t₂ and e in tetrahedral field is called Crystal Field Splitting Parameters.
It is denoted by 10Dq or Δ.

Where-
Z= Charge on the metal ion
e = Charge on the ligand
r = Average distance of d-orbitals charge density
a = Inter nuclear distance between metal ion and ligand
μ = Dipole moment of the ligand

Also read
Factors affecting magnitude of 10Dq / Δ
Crystal Field Splitting or Stabilization Energy

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