摘要
文章论述广西某些地区铝土矿及红土的针铁矿中铝的类质同象置换现象，并运用Ｘ射线衍射分析法测定其中的置换率。这种针铁矿称为铝针铁矿。文中指出，在地表氧化条件下形成的针铁矿中，这种置换现象甚为普遍；置换率的高低反映其形成时的地质环境及物理化学条件；高置换率常常与高成熟度红土化作用特别是红土型铝土矿密切相关。铝一旦进入针铁矿晶格后，将出现稳定性效应，在矿物被溶解或相变成其他矿物之前是不会自行析出的。因此，对其研究不仅可用以判断形成环境，而且。
This paper discusses the isomorphous substitution phenomenon of aluminium in bauxite and laterite geothite in some regions of Guangxi, and uses x-ray diffraction analysis method to measure its substitution ratio. This geothite is named alumogeothite. In this paper, the author points out, in the geothite which forms under the oxidizing condition of earth's surface, that the substitution phenomenon is fairly common, the range of the substitution ratio reflects the geological environment and plysicochemical conditions while it's forming, the high substitution ratio is closely related with the high maturity laterization, especially with lateritic bauxite. Once that aluminium enters into geothite's lattice, the stability effect will appear, aluminium will not separate out itself before the mineral dissolves or changes into other minerals. Therefore, to study these not only can determine its forming environment, but also even has important significance on the calculation of bauxite mineral weight and the effective exsolution ratio, and on the reasonable option of industrial application circuit.
出处
《广西地质》
1997年第2期21-24,36,共5页
Guangxi Geology
基金
中国有色金属总公司开放实验室基金
关键词
铝
针铁矿
类质同象置换率
晶体化学
X射线衍射
Alumogeothite, isomorphous substitution ratio,crystallochemistry, x-ray diffraction analysis, Guangxi
