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Physical Properties of Cobalt and Platinum

Cobalt
Platinum
Physical Properties of Platinum and Cobalt


Physical Properties
Melting Point
1,495.00 °C   
29
1,772.00 °C   
16
Boiling Point
2,870.00 °C   
34
3,827.00 °C   
15
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gray   
Silvery White   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
5.00   
8
3.50   
11
Brinell Hardness
470.00 MPa   
26
300.00 MPa   
34
Vickers Hardness
1,043.00 MPa   
11
400.00 MPa   
25
Speed of Sound
4,720.00 m/s   
14
2,800.00 m/s   
29
Optical Properties
  
  
Reflectivity
67.00 %   
11
73.00 %   
8
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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