The diaspore is also known as diaspore, and its structural formula and molecular formula are AlO(OH) and Al2O3·H2O, respectively. Orthorhombic crystal system, those with intact crystals are columnar, plate-like, scaly, needle-like, prism-like, etc. Diabsite is soluble in acid and alkali, but it is very weak at normal temperature and pressure, and needs to be fully decomposed under high temperature and high pressure and strong acid or alkali concentration.

Boehmite, also known as boehmite and boehmite, has a structural formula of AlO(OH) and a molecular formula of Al2O3·H2O. Orthorhombic crystal system, with intact crystals in the form of rhombus, prismatic, prismatic, needle-like, fibrous and hexagonal. Boehmite is soluble in acids and bases. The mineral is formed in acidic media, mainly in sedimentary bauxite, and is characterized by symbiosis with siderite.

Gibbsite is also known as diaspore, hydroxyaluminite, the structural formula is Al(OH), and the molecular formula is Al2O3·3H2O. Monoclinic crystal system, those with intact crystals are hexagonal plate-like and prism-like, often in the form of fine crystal aggregates or twin crystals, and gibbsite in the ore is mostly irregular aggregates. It is soluble in acid and alkali, and its powder It can be completely dissolved by heating to 100℃ for 2h. This mineral is formed in acidic media.