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Boron Carbide - B4C
Classification: Ceramic
Atomic numbers: 5 & 6
Atomic weight: 55
Melting point (C): 2350
Boiling point (C): 3500
Density (g/cm3): 2.50
Hardness (Mosh-scratch): 9.3
Crystal structure: Isometric-normal: (100) cube
Color (solid): Black
Cleavage: Cubic: (001)