Magnetic-susceptibility measurements have been used to locate the low-lying crystal-field levels of Sr${\mathrm{F}}_2$: ${\mathrm{Ce}}^{3+}$. Three of the four levels arising from the crystal-field-split ${}_{}{}^2{}_{}{}^{}F_{\frac{7}{2}}^{}{}_{}{}^{}$ manifold were located by optical-absorption spectra. The fourth level is predicted. The experimental results placed the seven tetragonally split crystal-field levels at 0, 39, 1085, 2215, 2280, 2393, and 3380 ${\mathrm{cm}}^{-1\mathrm{}}$.

• Received 15 October 1979

DOI:https://doi.org/10.1103/PhysRevB.21.1876