(中南大学资源加工与生物工程学院，长沙 410083)
摘 要: 基于萤石的晶体(表面)结构，研究并总结表面断裂键性质、解理及暴露面性质、表面(自由)能、润湿性、表面电性、吸附性等萤石表面物理化学性质的各向异性，讨论萤石晶体结构特征与表面性质之间的关系，分析不同表面性质之间的关联。结果表明：表面断裂键密度和表面能存在正相关性，表面断裂键密度可准确预测萤石的解理和暴露面性质，表面离子层结构差异、表面Ca质点及其断裂键差异可解释表面电性、润湿性、溶解性及吸附性的各向异性。
关键字: 萤石；表面能；表面断裂键；各向异性；浮选
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The research progress on anisotropic surface physicochemical properties of fluorite, including surface broken bonds, cleavage nature, surface (free) energy, surface charge, wettability and adsorption behavior, was reviewed in this work based on the crystal (surface) structure of fluorite. The relationships between crystal structure and surface properties were discussed, and the correlations among these surface properties were discussed. The results show that the positive relation between surface broken bonds density and surface energy of fluorite is found, and the former can be used to predict the cleavage nature and the commonly exposed surfaces. The surface Ca distribution feature and its broken (or unsaturated) bonds number can be used to explain the anisotropic surface charging properties, wettability, dissolution and adsorption behavior of fluorite.
Key words: fluorite; surface energy; surface broken bonds; anisotropy; flotation
