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Physical Properties of Thallium and Praseodymium

Thallium
Praseodymium
Physical Properties of Praseodymium and Thallium


Physical Properties
Melting Point
303.50 °C   
99+
935.00 °C   
99+
Boiling Point
1,457.00 °C   
99+
3,130.00 °C   
27
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Grayish White   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
1.20   
20
Not Available   
Brinell Hardness
26.50 MPa   
99+
481.00 MPa   
24
Vickers Hardness
Not Available   
400.00 MPa   
25
Speed of Sound
818.00 m/s   
99+
2,280.00 m/s   
40
Optical Properties
  
  
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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