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Physical Properties of Chromium and Cobalt

Chromium
Cobalt
Physical Properties of Cobalt and Chromium


Physical Properties
Melting Point
1,857.00 °C   
14
1,495.00 °C   
29
Boiling Point
2,672.00 °C   
39
2,870.00 °C   
34
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
8.50   
1
5.00   
8
Brinell Hardness
687.00 MPa   
16
470.00 MPa   
26
Vickers Hardness
1,060.00 MPa   
10
1,043.00 MPa   
11
Speed of Sound
5,940.00 m/s   
5
4,720.00 m/s   
14
Optical Properties
  
  
Reflectivity
Not Available   
67.00 %   
11
Allotropes
No   
Yes   
α Allotropes
Not Available   
α-Cobalt   
β Allotropes
Not Available   
β-Cobalt   
γ Allotropes
Not Available   
Not Available   
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