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Technetium
Technetium

Rhenium
Rhenium



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Technetium
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Rhenium

Physical Properties of Technetium and Rhenium

Physical

Melting Point

2,200.00 °C3,180.00 °C
-38.83 3410
👆🏻

Boiling Point

4,877.00 °C5,627.00 °C
0 5660
👆🏻

Appearance

Physical State

Solid
Solid

Color

Shiny Gray
Silvery Gray

Luster

-
Metallic

Hardness

Mohs Hardness

2.257.00
0.2 8.5
👆🏻

Brinell Hardness

550.00 MPa1,320.00 MPa
0.14 3490
👆🏻

Vickers Hardness

500.00 MPa1,350.00 MPa
0 3920
👆🏻

Speed of Sound

16,200.00 m/s4,700.00 m/s
818 16200
👆🏻

Optical Properties

Refractive Index

1.901.90
0.155 3.41
👆🏻

Reflectivity

35.00 %70.00 %
5 97
👆🏻

Allotropes

α Allotropes

-
-

β Allotropes

-
-

γ Allotropes

-
-