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Société Coopérative Minérales Mutabazi

Tantalum / Coltan

Chemical Formula Ta
Color Gray, bluish-gray, or metallic
Hardness 6 – 6.5 on the Mohs scale
Density 16.6 g/cm³
Melting Point 3,017 °C (5,463 °F)
Boiling Point 5,459 °C (9,865 °F)
Crystal System Body-centered cubic (BCC)
Electrical Conductivity Good (highly conductive)
Thermal Conductivity 57.5 W/m·K
Refractive Index N/A
Luster Metallic
Appearance Lustrous gray metal or powder
Specific Gravity 16.6