Tantalum Metal

Physical Properties

Appearance: Hard, dense, blue-gray metal
Density: 16.69 g/cm³
Melting Point: 3,017 °C (5,463 °F)
Boiling Point: 5,458 °C (9,856 °F)
Crystal Structure: Body-centered cubic (BCC)
Hardness: ~6.5 Mohs
Electrical Conductivity: Good conductor
Thermal Conductivity: 57.5 W/m·K

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Chemical Properties

Corrosion Resistance: Extremely resistant to corrosion
Oxidation State: +5 (most stable), +4, +3
Reactivity:
Resistant to acids except hydrofluoric acid
Forms protective oxide layer Ta₂O₅
Chemical Stability: Very stable at high temperatures