明矾石是高岭土中难以除去的有害杂质，高岭石也是明矾石矿石中的有害杂质。

Alunite is a harmful impurity which is difficult to remove from kaolinite and so is kaolinite in alunite ore.

对用碱熔法从明矾石中提取铝进行了实验。

The tests of extraction aluminium from alum stone with alkali fusion method were carried out.

峨嵋叶蜡石矿储量大，矿石类型主要有石英叶蜡石型、硬水铝石叶蜡石型、叶蜡石型、明矾石叶蜡石型等。

Emei pyrophyllite deposit possesses a large amount of reserves with different types of pyrophyllite ore, such as quartz-pyrophyllite, diaspore-pyrophyllite, pyrophyllite and alunite-pyrophyllite etc.