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Physical Properties of Iridium and Thallium

Iridium
Thallium
Physical Properties of Thallium and Iridium


Physical Properties
Melting Point
2,410.00 °C   
7
303.50 °C   
99+
Boiling Point
4,527.00 °C   
10
1,457.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery White   
Luster
Metallic   
NA   
Hardness
  
  
Mohs Hardness
6.50   
5
1.20   
20
Brinell Hardness
1,670.00 MPa   
5
26.50 MPa   
99+
Vickers Hardness
1,760.00 MPa   
3
Not Available   
Speed of Sound
4,825.00 m/s   
13
818.00 m/s   
99+
Optical Properties
  
  
Reflectivity
78.00 %   
6
Not Available   
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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