Physical Properties of Cobalt and Magnesium
Melting Point
1,495.00 °C
  
29
Boiling Point
2,870.00 °C
  
34
1,107.00 °C
  
99+
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Gray
  
Gray
  
Luster
Metallic
  
NA
  
Hardness
  
  
Vickers Hardness
1,043.00 MPa
  
11
Not Available
  
Speed of Sound
4,720.00 m/s
  
14
4,940.00 m/s
  
11
Optical Properties
  
  
Allotropes
Yes
  
No
  
α Allotropes
α-Cobalt
  
Not Available
  
β Allotropes
β-Cobalt
  
Not Available
  
γ Allotropes
Not Available
  
Not Available