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columbium, niobium metal powder, niobium granules, niobium turnings, niobium slug, niobium single crystal, niobium foil, niobium target, niobium gauze, niobium wire, niobium rod, niobium tube, CAS# 7440-03-1
Chemical Name: Niobium
Chemical Formula: Nb
Though most metallurgists refer to the metal as columbium, the name niobium was officially adopted by chemical authorities in 1950 after 100 years of controversy. Niobium is steel-gray or silvery-white, but takes on a bluish tint when exposed to air at room temperatures for extended periods. The metal's oxidation in air commences at 200°C. Niobium, when used in alloying, improves strength, and its superconductive properties are enhanced when combined with zirconium.
99.8% up to in some cases 99.99%
Niobium metal powder, granules, turnings, slug, single crystal, foil, target, gauze, wire, rod, tube
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Atomic Number
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41
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Molecular Weight (g/mol.)
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92.906
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Apparent Density (g/cm3)
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8.57
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Specific Heat Capacity
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(25 °C) 24.60 J·mol−1·K−1
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Specific Heat @25°C (cal/g-°C)
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.065
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Melting Point (°C)
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2468
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Boiling Point (°C)
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4742
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Thermal Conductivity (cal/s-cm°C)
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.125
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Solubility In Water
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insoluble
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Electroical Resistivity
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(0 °C) 152 nΩ·m
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Electronegativity (Pauling scale)
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1.6
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Appearance
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lustrous, steel gray metal, no odor.
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Crystallography
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cubic structure, body centered
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Sodium vapor lamps, corrosion-resistant equipment, superconducting magnets, aerospace parts, alloys, and drill bits.
Drums or boxes
Listed. For further information please call the E.P.A. at +1.202-554-1404
CAS# 7440-03-1
3089
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