Physical Properties of Erbium and Iron
Melting Point
1,522.00 °C
  
28
1,535.00 °C
  
25
Boiling Point
2,510.00 °C
  
99+
2,750.00 °C
  
37
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery White
  
Gray
  
Luster
Lustrous
  
Metallic
  
Hardness
  
  
Mohs Hardness
Not Available
  
Speed of Sound
2,830.00 m/s
  
28
5,120.00 m/s
  
8
Optical Properties
  
  
Reflectivity
Not Available
  
Allotropes
No
  
Yes
  
α Allotropes
Not Available
  
Ferrite (alpha Iron)
  
β Allotropes
Not Available
  
beta Iron
  
γ Allotropes
Not Available
  
gamma Iron