铝氧八面体

硅酸盐粘土由Si-O四面体和Al-O铝氧八面体组成，根据四面体和八面体的比例，硅酸盐粘土分为1∶1和2∶1型两类。

The silicate clays consisting of Si-O tetrahedron and Al-O octahedron are classed into tow types according to the ratio of tetrahedron and octahedron , viz . 1 ∶ 1 type and 2 ∶ 1 type .

一水硬铝石晶体结构中，铝氧八面体形成双链，双链间以角顶相连，链内八面体共棱连结；

In the crystal lattice of diaspore , aluminium-oxygen octahedron forms double chains .

研究指出：酸对蒙脱石晶体中的铝氧八面体破坏性强于硅氧四面体，导致残酸中硅/铝（Si／Al）元素重量比值比理论值低，酸蚀残余物中刚好相反。

It is concluded the value of Si / Al in residual acid fluid is lower and Si / Al value of the remaining smectite is higher than the theoretical prediction because alumina octahedral is more corroded by acids than silicon - oxygen tetrahedral .

其主要结构单元是硅氧四面体和铝氧八面体。

The main structure unit of clay minerals contains silicon-oxygen tetrahedron and aluminium-oxygen octahedron .