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Physical Properties of Tantalum and Neptunium

Tantalum
Neptunium
Physical Properties of Neptunium and Tantalum


Physical Properties
Melting Point
2,996.00 °C   
4
640.00 °C   
99+
Boiling Point
5,425.00 °C   
4
3,902.00 °C   
13
Appearance
  
  
Physical State
Solid   
Solid   
Color
Gray Blue   
Silver   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
6.50   
5
Not Available   
Brinell Hardness
440.00 MPa   
28
Not Available   
Vickers Hardness
870.00 MPa   
12
Not Available   
Speed of Sound
3,400.00 m/s   
22
Not Available   
Optical Properties
  
  
Reflectivity
78.00 %   
6
Not Available   
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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