Einsteinium

Promethium

Physical Properties of Einsteinium and Promethium

Einsteinium

Promethium

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Physical

Melting Point

Boiling Point

Physical State

Color

Luster

Mohs Hardness

Brinell Hardness

Vickers Hardness

Speed of Sound

Refractive Index

Reflectivity

Allotropes

α Allotropes

β Allotropes

γ Allotropes

860.00 °C

996.00 °C

Solid

Silver

6.00

240.00 MPa

550.00 MPa

2,850.00 m/s

1.30

63.00 %

✔✘

1,042.00 °C

3,000.00 °C

Solid

Metallic

400.00 MPa

600.00 MPa

2,260.00 m/s

1.70

63.00 %

✔✘

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