What Is The Crystal Structure Of Aluminium Diboride?

Aluminum diboride (AlB2) has a hexagonal crystal structure, also known as the h-AlB2 phase. The unit cell of AlB2 contains two aluminum atoms and four boron atoms, arranged in a hexagonal lattice with a space group of P6/mmm.

The aluminum atoms occupy the center of the hexagonal basal plane, while the boron atoms form a distorted trigonal planar arrangement around each aluminum atom. The resulting structure can be visualized as layers of boron atoms sandwiched between two layers of aluminum atoms.

The bonding in AlB2 is primarily covalent, with strong directional bonds between the boron and aluminum atoms. These directional bonds give rise to the anisotropic mechanical, electrical, and thermal properties of the material.

Overall, the crystal structure of AlB2 plays a critical role in determining its physical and chemical properties, making it an important material for a wide range of applications, including cutting tools, wear-resistant coatings, and electronic devices.