Why aluminium carbide has high hardness
What is Aluminium Carbide? Aluminium carbide also known as aluminum tetracarbide with the molecular formula Al4C3, and is a form of aluminium carbonide. It is an ionic, translucent, hard, yellowish brown, hard rhombic hexagonal crystal. At room temperature it doesn't conduct electricity and has a complex crystal structure. It is possible to have 4,5-6 coordinated metal atoms within the system. The length of Al-C bonds in this system is 1.90-2.22A. The shortest CC bond is 3.16A. The Xray studi