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Physical Properties of Praseodymium and Rhenium

Praseodymium
Rhenium
Physical Properties of Rhenium and Praseodymium


Physical Properties
Melting Point
935.00 °C   
99+
3,180.00 °C   
2
Boiling Point
3,130.00 °C   
27
5,627.00 °C   
2
Appearance
  
  
Physical State
Solid   
Solid   
Color
Grayish White   
Silvery Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
7.00   
3
Brinell Hardness
481.00 MPa   
24
1,320.00 MPa   
8
Vickers Hardness
400.00 MPa   
25
1,350.00 MPa   
7
Speed of Sound
2,280.00 m/s   
40
4,700.00 m/s   
15
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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