萤石,顾名思义是指能发荧光的石头.石头为什么能发出荧光,在什么条件下发出荧光呢?科学工作者对这些问题十分感兴趣.萤石又称氟石,化学成分为CaF_2,在所有含氟矿物中,是含氟量最高的.萤石中常混入氯、沥青质、三氧化二铁、氧化铁以及稀土元素和铀.当稀土元素含量高时,有利用价值.萤石性脆,硬 Fluorite, as its name suggests, is a fluorescent stone. Why can a stone fluoresce and fluoresce under what conditions? Scientists are very interested in these issues. Fluorite, also known as fluorspar, has a chemical composition of CaF_2. Fluorine-containing minerals have the highest fluorine content. Fluorite is often mixed with chlorine, asphaltenes, ferric oxide, iron oxide, and rare earth elements and uranium. When the content of rare earth elements is high, it has utility value. Fluorite is brittle. hard