What is the crystal field splitting parameter in a tetrahedral field compared to an octahedral field for the same metal
For the same metal and ligands, the tetrahedral splitting ( Δ_t ) is 4/9 of the octahedral splitting ( Δ_o ), due to fewer ligands and different geometry.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Coordination Compounds and d Block Elements, Topic: Colour of [Ti(H₂O)₆]³⁺, d-d transition, crystal field theory.