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Physical Properties of Praseodymium and Promethium

Praseodymium
Promethium
Physical Properties of Promethium and Praseodymium


Physical Properties
Melting Point
935.00 °C   
99+
1,042.00 °C   
99+
Boiling Point
3,130.00 °C   
27
3,000.00 °C   
31
Appearance
  
  
Physical State
Solid   
Solid   
Color
Grayish White   
Unknown   
Luster
Metallic   
Metallic   
Hardness
  
  
Brinell Hardness
481.00 MPa   
24
Not Available   
Vickers Hardness
400.00 MPa   
25
Not Available   
Speed of Sound
2,280.00 m/s   
40
Not Available   
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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Lanthanide Metals

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