Physical Properties of Cobalt and Niobium
Physical Properties
Melting Point
1,495.00 °C
29
2,468.00 °C
6
Boiling Point
2,870.00 °C
34
2,468.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Gray
Gray
Luster
Metallic
Metallic
Hardness
Mohs Hardness
5.00
8
6.00
6
Brinell Hardness
470.00 MPa
26
735.00 MPa
14
Vickers Hardness
1,043.00 MPa
11
870.00 MPa
12
Speed of Sound
4,720.00 m/s
14
3,480.00 m/s
21
Optical Properties
Reflectivity
67.00 %
11
Not Available
Allotropes
Yes
No
α Allotropes
α-Cobalt
Not Available
β Allotropes
β-Cobalt
Not Available
γ Allotropes
Not Available
Not Available
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