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星叶石是碱性岩中分布较广泛的副矿物,成分富含碱金属K、Na及Ti,随其产出的地球化学条件,类质同象代换情况较复杂,形成许多成分异种。本工作之前对其组成和性质都不十分清楚,前人虽进行了一般矿物学研究,但未能确定所属晶系,B.C.索波列夫曾推断星叶石中Ti呈四面体配位,并与硅氧四面体组成复杂构造。为了阐明星叶石的组成及其性质,并进一步研究含Ti硅酸盐的晶体化学特点,我们对星叶石族矿物做了较系统的研究,测定了星叶石的两种结构:单斜镁星叶石和三斜
Asterite is a widely distributed accessory mineral in alkaline rocks. Its composition is rich in alkali metals such as K, Na and Ti. Due to its geochemical conditions and the isomerism substitution, it is more complicated to form many dissimilar species. Before the work of its composition and nature are not very clear, although the predecessors conducted a general mineralogy study, but failed to determine the belonging crystal system, BC Sopo Lev has concluded that the astellite Ti tetrahedron coordination and Complex structure with the silicon tetrahedron. In order to elucidate the composition and properties of asteroid stone and to further study the crystal chemistry of Ti-containing silicate, we systematically studied the asparagus mineral and determined the two structures of monoclinic stone: monoclinic Magnesium leaf stone and triclinic