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Physical Properties of Cobalt and Niobium

Cobalt
Niobium
Physical Properties of Niobium and Cobalt


Physical Properties
Melting Point
1,495.00 °C   
29
2,468.00 °C   
6
Boiling Point
2,870.00 °C   
34
2,468.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gray   
Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
5.00   
8
6.00   
6
Brinell Hardness
470.00 MPa   
26
735.00 MPa   
14
Vickers Hardness
1,043.00 MPa   
11
870.00 MPa   
12
Speed of Sound
4,720.00 m/s   
14
3,480.00 m/s   
21
Optical Properties
  
  
Reflectivity
67.00 %   
11
Not Available   
Allotropes
Yes   
No   
α Allotropes
α-Cobalt   
Not Available   
β Allotropes
β-Cobalt   
Not Available   
γ Allotropes
Not Available   
Not Available   
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