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Niobium Oxide - Nb₂O₅

Classification: Oxide
Atomic numbers: 41 & 8
Atomic weight: 265.82
Melting point (C): >400
Boiling point (C):
Density (g/cm3):
Refractive index (n=):
Hardness (Mosh-scratch): 6-7
Crystal structure: Monoclinic-normal: (100) a-pinacoid
Color (solid): Greyish
Cleavage: None, conchoidal fracture