The crystal field splitting energy is
where r is the radius of the orbital and R is the metal-ligand internuclear distance. The crystal splitting energy is altered with pressure, so the position of the peak in an optical absorption spectrum changes with pressure. For octahedral crystals, in order of increasing
,
For cubic crystals,
and for tetrahedral crystals,
(1)
where r is the radius of the orbital and R is the metal-ligand internuclear distance. The crystal splitting energy is altered with pressure, so the position of the peak in an optical absorption spectrum changes with pressure. For octahedral crystals, in order of increasing
,(2)
For cubic crystals,
(3)
and for tetrahedral crystals,
(4)
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