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Technetium
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Niobium
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Technetium
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Niobium
Physical Properties of Technetium and Niobium
Technetium
Niobium
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Summary
Periodic Table
Facts
Uses
Physical
Chemical
Atomic
Mechanical
Magnetic
Thermal
All
Physical
Melting Point
2,200.00 °C
2,468.00 °C
-38.83
3410
👆🏻
Boiling Point
4,877.00 °C
2,468.00 °C
0
5660
👆🏻
Appearance
Physical State
Solid
Solid
Color
Shiny Gray
Gray
Luster
-
Metallic
Hardness
Mohs Hardness
2.25
6.00
0.2
8.5
👆🏻
Brinell Hardness
550.00 MPa
735.00 MPa
0.14
3490
👆🏻
Vickers Hardness
500.00 MPa
870.00 MPa
0
3920
👆🏻
Speed of Sound
16,200.00 m/s
3,480.00 m/s
818
16200
👆🏻
Optical Properties
Refractive Index
1.90
2.30
0.155
3.41
👆🏻
Reflectivity
35.00 %
70.00 %
5
97
👆🏻
Allotropes
✔
✘
✔
✘
α Allotropes
-
-
β Allotropes
-
-
γ Allotropes
-
-
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