萤石也叫氟石,工业上主要用于冶金组溶剂,无色透明质地完好的萤石晶体是很好的光学材料,用于制作高品质的光学镜头。等轴晶系晶体结构。Ca分布在立方晶胞的角顶与面中心,如果将晶胞分为八个小立方体,则F占据每一小立方体中心。化学式为:Ca F2,Th、Co、U等稀土元素和Y可以类质同象形式代替Ca,也可以吸附形式赋存在裂隙中,或形成独立的矿物被萤石包裹其中。正是由于萤石独特的晶体结构,以及存在稀土等元素替代Ca元素等现象引起的各种晶体缺陷,造就了 Fluorite, also known as fluorite, is industrially used mainly for metallurgical group solvents. The clear and colorless fluorite crystal is a good optical material for producing high-quality optical lenses. Isometric system crystal structure. Ca is distributed at the canthus and the center of the plane of the cubic cell, and if the cell is divided into eight small cubes, then F occupies each small cuboid center. Chemical formula: Ca F2, Th, Co, U and other rare earth elements and Y can be replaced by the isomorphous form of Ca, can also be deposited in the form of adsorption in the fissure, or the formation of independent minerals surrounded by fluorite. It is precisely because of the unique fluorite crystal structure, as well as the existence of rare earth elements such as the replacement of Ca and other phenomena caused by a variety of crystal defects, created