Although the main clay mineral is Kaolinite, the structural change during heating is different from pure kaolinite. 其主要粘土矿物是高岭石，但加热相变有别于纯净的高岭石。
China is abundant with sedimentary diaspore and kaolinite mineral resources.Their reserves are both the first in the world. 我国沉积高岭石矿和硬水铝石铝土矿资源丰富，其储量和质量均为世界之冠。