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Physical Properties of Cobalt and Silver

Cobalt
Silver
Physical Properties of Silver and Cobalt


Physical Properties
Melting Point
1,495.00 °C   
29
961.93 °C   
99+
Boiling Point
2,870.00 °C   
34
2,212.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gray   
Silvery White   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
5.00   
8
2.50   
14
Brinell Hardness
470.00 MPa   
26
251.00 MPa   
37
Vickers Hardness
1,043.00 MPa   
11
229.00 MPa   
30
Speed of Sound
4,720.00 m/s   
14
2,680.00 m/s   
34
Optical Properties
  
  
Reflectivity
67.00 %   
11
97.00 %   
1
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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