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Einsteinium
Einsteinium

Neptunium
Neptunium



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Einsteinium
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Neptunium

Physical Properties of Einsteinium and Neptunium

Physical

Melting Point

860.00 °C640.00 °C
-38.83 3410
👆🏻

Boiling Point

996.00 °C3,902.00 °C
0 5660
👆🏻

Appearance

Physical State

Solid
Solid

Color

Silver
Silver

Luster

-
Metallic

Hardness

Mohs Hardness

6.006.00
0.2 8.5
👆🏻

Brinell Hardness

240.00 MPa622.00 MPa
0.14 3490
👆🏻

Vickers Hardness

550.00 MPa640.00 MPa
0 3920
👆🏻

Speed of Sound

2,850.00 m/s2,260.00 m/s
818 16200
👆🏻

Optical Properties

Refractive Index

1.301.30
0.155 3.41
👆🏻

Reflectivity

63.00 %64.00 %
5 97
👆🏻

Allotropes

α Allotropes

-
-

β Allotropes

-
-

γ Allotropes

-
-