Physical Properties of Neodymium and Holmium
Melting Point
1,010.00 °C
  
99+
1,461.00 °C
  
30
Boiling Point
3,127.00 °C
  
28
2,600.00 °C
  
99+
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery White
  
Silvery White
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
Speed of Sound
2,330.00 m/s
  
38
2,760.00 m/s
  
30
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available