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Magnesium Oxide - MgO

Classification: Oxide
Atomic numbers: 12 & 8
Atomic weight: 40.32
Melting point (C): 800-2500 (2800)
Boiling point (C):
Density (g/cm3): 3.69-3.90 (3.59)
Refractive index (n=): 1.74 (1.736)
Hardness (Mosh-scratch): 6
Crystal structure: Isometric-normal: (100) cube
Color (solid): Clear/White
Cleavage: Cubic: (001)