B-x polyhedra, Hardness, Orthorhombic

• B-Mg
• Ca-O-Ti
• B-C-Mg
• Al-B-Li
• B-Si
• Vickers hardness number
• Knoop hardness
• microhardness
• Mohs hardness
• metalloid
• boride
• disordered
• non-disordered
• alkaline