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Neptunium
Neptunium




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Physical Properties of Neptunium

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Physical

Melting Point

640.00 °C
Rank: 62 (Overall)
27 3410
👆🏻

Boiling Point

3,902.00 °C
Rank: 13 (Overall)
147 5660
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Appearance

Physical State

Solid

Color

Silver

Luster

Metallic

Hardness

Mohs Hardness

Not Available
0.2 8.5
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Brinell Hardness

Not Available
0.14 3490
👆🏻

Vickers Hardness

Not Available
121 3430
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Speed of Sound

Not Available
818 16200
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Optical Properties

Refractive Index

Not Available
1.000933 1.7229
👆🏻

Reflectivity

Not Available
58 97
👆🏻

Allotropes

No - Actinide Series Metals has it !

α Allotropes

Not Available

β Allotropes

Not Available

γ Allotropes

Not Available