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Promethium
Promethium




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Physical Properties of Promethium

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Physical

Melting Point

1,042.00 °C
Rank: 43 (Overall)
-38.83 3410
👆🏻

Boiling Point

3,000.00 °C
Rank: 32 (Overall)
0 5660
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Appearance

Physical State

Solid

Color

-

Luster

Metallic

Hardness

Mohs Hardness

-
0.2 8.5
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Brinell Hardness

400.00 MPa
Rank: 34 (Overall)
0.14 3490
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Vickers Hardness

600.00 MPa
Rank: 28 (Overall)
0 3920
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Speed of Sound

2,260.00 m/s
Rank: 58 (Overall)
818 16200
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Optical Properties

Refractive Index

1.70
Rank: 27 (Overall)
0.155 3.41
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Reflectivity

63.00 %
Rank: 20 (Overall)
5 97
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Allotropes

No - Lanthanide Series Metals has it !

α Allotropes

-

β Allotropes

-

γ Allotropes

-