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Physical Properties of Iridium and Cobalt

Iridium
Cobalt
Physical Properties of Cobalt and Iridium


Physical Properties
Melting Point
2,410.00 °C   
7
1,495.00 °C   
29
Boiling Point
4,527.00 °C   
10
2,870.00 °C   
34
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
6.50   
5
5.00   
8
Brinell Hardness
1,670.00 MPa   
5
470.00 MPa   
26
Vickers Hardness
1,760.00 MPa   
3
1,043.00 MPa   
11
Speed of Sound
4,825.00 m/s   
13
4,720.00 m/s   
14
Optical Properties
  
  
Reflectivity
78.00 %   
6
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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