Physical Properties of Iron and Gadolinium
Melting Point
1,535.00 °C
  
25
1,311.00 °C
  
35
Boiling Point
2,750.00 °C
  
37
3,233.00 °C
  
25
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Gray
  
Silvery White
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
Not Available
  
Speed of Sound
5,120.00 m/s
  
8
2,680.00 m/s
  
34
Optical Properties
  
  
Reflectivity
Not Available
  
Allotropes
Yes
  
No
  
α Allotropes
Ferrite (alpha Iron)
  
Not Available
  
β Allotropes
beta Iron
  
Not Available
  
γ Allotropes
gamma Iron
  
Not Available