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Physical Properties of Polonium and Iridium

Polonium
Iridium
Physical Properties of Iridium and Polonium


Physical Properties
Melting Point
254.00 °C   
99+
2,410.00 °C   
7
Boiling Point
962.00 °C   
99+
4,527.00 °C   
10
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silver   
Silvery White   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
6.50   
5
Brinell Hardness
Not Available   
1,670.00 MPa   
5
Vickers Hardness
Not Available   
1,760.00 MPa   
3
Speed of Sound
Not Available   
4,825.00 m/s   
13
Optical Properties
  
  
Reflectivity
Not Available   
78.00 %   
6
Allotropes
Yes   
No   
α Allotropes
α-polonium   
Not Available   
β Allotropes
β-polonium   
Not Available   
γ Allotropes
Not Available   
Not Available   
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