星叶石是层状钛硅酸盐矿物。M.弗莱谢尔(Fleischer)认为,本族矿物中除锰星叶石(Kupletskite)外,还包括有四个独立变种矿物,它们是星叶石(Astrophyllite)、铌星叶石(Niobophyllite)、锆星叶石(Zircophyllite)和铯星叶石(Cesium-Kupletskite)。根据前人研究,在层状钛硅酸盐中,Ti起着双重作用。一方面可以加入八面体层起着典型的阳离子作用,配位数为Ⅵ;另一方面在所有层状钛硅酸盐结构中都有钛氧八面体和硅氧四面体组成 Asterite is a layered titanosilicate mineral. M. Fleischer argues that in addition to Kupletskite, the native minerals include four independent variants of minerals, such as Astrophyllite, Niobophyllite, Zircophyllite, and Cesium-Kupletskite. According to previous studies, Ti plays a dual role in layered titanosilicates. On the one hand, the octahedral layer can be added to play a typical role of cation coordination number Ⅵ; on the other hand in all layered titanosilicate structure has titanium oxide octahedron and silicon tetrahedron composition