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Physical Properties of Rhodium and Cobalt

Rhodium
Cobalt
Physical Properties of Cobalt and Rhodium


Physical Properties
Melting Point
1,966.00 °C   
12
1,495.00 °C   
29
Boiling Point
3,727.00 °C   
17
2,870.00 °C   
34
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
6.00   
6
5.00   
8
Brinell Hardness
980.00 MPa   
9
470.00 MPa   
26
Vickers Hardness
1,100.00 MPa   
9
1,043.00 MPa   
11
Speed of Sound
4,700.00 m/s   
15
4,720.00 m/s   
14
Optical Properties
  
  
Reflectivity
84.00 %   
4
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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