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Physical Properties of Rhenium and Niobium

Rhenium
Niobium
Physical Properties of Niobium and Rhenium


Physical Properties
Melting Point
3,180.00 °C   
2
2,468.00 °C   
6
Boiling Point
5,627.00 °C   
2
2,468.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery Gray   
Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
7.00   
3
6.00   
6
Brinell Hardness
1,320.00 MPa   
8
735.00 MPa   
14
Vickers Hardness
1,350.00 MPa   
7
870.00 MPa   
12
Speed of Sound
4,700.00 m/s   
15
3,480.00 m/s   
21
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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