Physical Properties of Iridium and Uranium
Melting Point
1,132.00 °C
  
39
Boiling Point
4,527.00 °C
  
10
3,818.00 °C
  
16
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Silvery White
  
Silvery Gray
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
Brinell Hardness
1,670.00 MPa
  
5
2,350.00 MPa
  
2
Vickers Hardness
1,760.00 MPa
  
3
1,960.00 MPa
  
2
Speed of Sound
4,825.00 m/s
  
13
3,155.00 m/s
  
25
Optical Properties
  
  
Reflectivity
Not Available
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available