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Physical Properties of Cobalt and Hafnium

Cobalt
Hafnium
Physical Properties of Hafnium and Cobalt


Physical Properties
Melting Point
1,495.00 °C   
29
2,150.00 °C   
10
Boiling Point
2,870.00 °C   
34
5,400.00 °C   
5
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gray   
Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
5.00   
8
5.50   
7
Brinell Hardness
470.00 MPa   
26
1,450.00 MPa   
6
Vickers Hardness
1,043.00 MPa   
11
1,520.00 MPa   
5
Speed of Sound
4,720.00 m/s   
14
3,010.00 m/s   
27
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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