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Physical Properties of Gold and Iridium

Gold
Iridium
Physical Properties of Iridium and Gold


Physical Properties
Melting Point
1,064.43 °C   
99+
2,410.00 °C   
7
Boiling Point
2,807.00 °C   
36
4,527.00 °C   
10
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gold   
Silvery White   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
2.50   
14
6.50   
5
Brinell Hardness
194.00 MPa   
99+
1,670.00 MPa   
5
Vickers Hardness
216.00 MPa   
31
1,760.00 MPa   
3
Speed of Sound
2,030.00 m/s   
99+
4,825.00 m/s   
13
Optical Properties
  
  
Reflectivity
95.00 %   
2
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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