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Tungsten Sulfide - WS₂

Classification: Sulfide
Atomic numbers: 74 & 16
Atomic weight: 248.04
Melting point (C): 1000 est.
Boiling point (C):
Density (g/cm3): 7.5 (7.4)
Refractive index (n=):
Hardness (Mosh-scratch): 2.5
Crystal structure: Orthorhombic-normal: (100) pinacoid
Color (solid): Lead-grey
Cleavage: Basal: (001)