The ceric ion exists insilica glass melted in the O_2-enriched flame or by oxidation treatment. It has an intenseand broad absorption band in the UV range, its peak value lying at 260 nm, as is seldomdetected in most glasses.

• 高价铈离子存在于富氧火焰熔制和氧化处理的玻璃中,在紫外区具有强烈而宽阔的吸收带,峰值位于260nm处,这在大多数玻璃中是难于发现的。