Broad‐band uv flurescence is reported for LaF2 : Ce3+(2760–3120 A˚) and LuF3 : Ce3+(2880–3220 A˚). The five‐peak excitation spectrum expected for the 5dstate of Ce3+in a noncubic crystal field is observed. The fluorescence quantum yields for LaF3 : 1% Ce3+and LuF3 : 0.1% Ce3+are 0.9 and 0.82, respectively. Estimates of the threshold power for lasing action suggest that a laser system tunable from 2760 to 3220 A˚ is feasible with noble‐gas–halide lasers as pumping sources.