Physical Properties of Praseodymium and Ruthenium
Boiling Point
3,130.00 °C
  
27
3,900.00 °C
  
14
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Grayish White
  
Silvery White
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
2,160.00 MPa
  
3
Vickers Hardness
Not Available
  
Speed of Sound
2,280.00 m/s
  
40
5,970.00 m/s
  
4
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available