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