Structure and properties of boehmite

Boehmite, also known as boehmite (hydrated alumina), has a molecular formula of γ- AlOOH（ γ Alumina monohydrate, a major component of bauxite, was first discovered by German chemist Johann Bohm in 1925. From 1927 onwards γ- The ore formed by AlOOH is named boehmite.

Boehmite belongs to the orthorhombic crystal system and has a layered structure. Within each single structural layer, oxygen ions are densely packed and arranged at the vertices of the octahedron, while aluminum ions are located in the center of the octahedron to form a double-layer structure. Hydrogen ions are located on the surface of the layered structure, and the layers are connected by hydrogen bonds.

Boehmite is usually a white crystalline powder, but due to the impurities it contains, it often appears yellow, with a Mohs hardness of 3-3.5 and a specific gravity of 3-3.07. Due to its unique crystal structure and morphology, boehmite has the characteristics of zero charge, high interfacial free energy, large porosity, large specific surface area, good dispersibility, good gel solubility, and high heat resistance, and is widely used in industrial production.