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Physical Properties of Lanthanum and Praseodymium

Lanthanum
Praseodymium
Physical Properties of Praseodymium and Lanthanum


Physical Properties
Melting Point
920.00 °C   
99+
935.00 °C   
99+
Boiling Point
3,469.00 °C   
18
3,130.00 °C   
27
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Grayish White   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
2.50   
14
Not Available   
Brinell Hardness
350.00 MPa   
30
481.00 MPa   
24
Vickers Hardness
360.00 MPa   
26
400.00 MPa   
25
Speed of Sound
2,475.00 m/s   
37
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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