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Physical Properties of Platinum and Iridium

Platinum
Iridium
Physical Properties of Iridium and Platinum


Physical Properties
Melting Point
1,772.00 °C   
16
2,410.00 °C   
7
Boiling Point
3,827.00 °C   
15
4,527.00 °C   
10
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery White   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
3.50   
11
6.50   
5
Brinell Hardness
300.00 MPa   
34
1,670.00 MPa   
5
Vickers Hardness
400.00 MPa   
25
1,760.00 MPa   
3
Speed of Sound
2,800.00 m/s   
29
4,825.00 m/s   
13
Optical Properties
  
  
Reflectivity
73.00 %   
8
78.00 %   
6
Allotropes
No   
No   
α Allotropes
Not Available   
Not Available   
β Allotropes
Not Available   
Not Available   
γ Allotropes
Not Available   
Not Available   
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