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Physical Properties of Hafnium and Protactinium

Hafnium
Protactinium
Physical Properties of Protactinium and Hafnium


Physical Properties
Melting Point
2,150.00 °C   
10
1,568.00 °C   
21
Boiling Point
5,400.00 °C   
5
4,027.00 °C   
12
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gray   
Silver   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
5.50   
7
Not Available   
Brinell Hardness
1,450.00 MPa   
6
Not Available   
Vickers Hardness
1,520.00 MPa   
5
Not Available   
Speed of Sound
3,010.00 m/s   
27
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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