Although the main clay mineral is Kaolinite, the structural change during heating is different from pure kaolinite. 其主要粘土礦物是高嶺石，但加熱相變有別于純凈的高嶺石。
China is abundant with sedimentary diaspore and kaolinite mineral resources.Their reserves are both the first in the world. 我國沉積高嶺石礦和硬水鋁石鋁土礦資源豐富，其儲量和質量均為世界之冠。