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Physical Properties of Platinum and Cobalt

Platinum
Cobalt
Physical Properties of Cobalt and Platinum


Physical Properties
Melting Point
1,772.00 °C   
16
1,495.00 °C   
29
Boiling Point
3,827.00 °C   
15
2,870.00 °C   
34
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
3.50   
11
5.00   
8
Brinell Hardness
300.00 MPa   
34
470.00 MPa   
26
Vickers Hardness
400.00 MPa   
25
1,043.00 MPa   
11
Speed of Sound
2,800.00 m/s   
29
4,720.00 m/s   
14
Optical Properties
  
  
Reflectivity
73.00 %   
8
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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