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Copper Telluride - Cu₄Te₃

Classification: Telleride
Atomic numbers: 29 & 43
Atomic weight: 551.28
Melting point (C): 1000
Boiling point (C):
Density (g/cm3): 7.4
Refractive index (n=):
Hardness (Mosh-scratch): 3.5
Crystal structure: Isometric-tetrahedral: (112) tetrahedron
Color (solid): Purple/black
Cleavage: Tetrahedral: (112)