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Physical Properties of Cobalt and Thallium

Cobalt
Thallium
Physical Properties of Thallium and Cobalt


Physical Properties
Melting Point
1,495.00 °C   
29
303.50 °C   
99+
Boiling Point
2,870.00 °C   
34
1,457.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gray   
Silvery White   
Luster
Metallic   
NA   
Hardness
  
  
Mohs Hardness
5.00   
8
1.20   
20
Brinell Hardness
470.00 MPa   
26
26.50 MPa   
99+
Vickers Hardness
1,043.00 MPa   
11
Not Available   
Speed of Sound
4,720.00 m/s   
14
818.00 m/s   
99+
Optical Properties
  
  
Reflectivity
67.00 %   
11
Not Available   
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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