Strain-Induced Splitting of theE2State ofV2+in MgO

The 11498-${\mathrm{cm}}^{-1\mathrm{}}$ fluorescent line of ${\mathrm{V}}^{2+}$ in MgO is split and shifted by uniaxial stress. As has previously been observed for ${\mathrm{Cr}}^{3+}$ in MgO, the splitting is in very good agreement with a simple point charge model using the Hartree-Fock wave function of the free ion. This is taken to show that the agreement for ${\mathrm{Cr}}^{3+}$ is not purely coincidental.