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萤石(fluorite),化学式为CaF2,等轴晶系,O5h-Fm3m,其晶体结构可以看作Ca2+呈立方最紧密堆积,F-占据全部的四面体空隙。Ca常被稀土元素(RE)取代而具有荧光性能,且吸收能量能力强、发光效率高、发射波长范围广、理化性质稳定。因此,萤石是发光材料的一种很好的基质,长期被用作掺杂离子的基础研究。
Fluorite has the chemical formula CaF2, the equiaxed crystal system, and the O5h-Fm3m crystal structure. The crystal structure can be regarded as the closest packing of Ca2 + in the cubic form, and F- occupies all the tetrahedral voids. Ca is often replaced by rare earth elements (RE) and has fluorescence properties, and energy absorption ability, high luminous efficiency, emission wavelength range, physical and chemical properties stable. Therefore, fluorite is a good substrate for luminescent materials and has long been used as a basic research for doping ions.