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Physical Properties of Cobalt and Iridium


Physical Properties of Iridium and Cobalt


Physical Properties

Melting Point
1,495.00 °C   
29
2,410.00 °C   
7

Boiling Point
2,870.00 °C   
34
4,527.00 °C   
10

Appearance
  
  

Physical State
Solid   
Solid   

Color
Gray   
Silvery White   

Luster
Metallic   
Metallic   

Hardness
  
  

Mohs Hardness
5.00   
8
6.50   
5

Brinell Hardness
470.00 MPa   
26
1,670.00 MPa   
5

Vickers Hardness
1,043.00 MPa   
11
1,760.00 MPa   
3

Speed of Sound
4,720.00 m/s   
14
4,825.00 m/s   
13

Optical Properties
  
  

Reflectivity
67.00 %   
11
78.00 %   
6

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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