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Copper Selenide - Cu₂Se

Classification: Selenide
Atomic numbers: 29 & 34
Atomic weight: 206.10
Melting point (C): >1200
Boiling point (C):
Density (g/cm3): 6.71
Refractive index (n=):
Hardness (Mosh-scratch): 3-4
Crystal structure: Isometric-normal: (100) cube
Color (solid): Silver-white
Cleavage: Cubic: (001)