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Actinium

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Beryllium

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Actinium

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Physical Properties of Actinium and Beryllium

Actinium Metal

Actinium

Beryllium Metal

Beryllium

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1 Physical

1.1 Melting Point

1,227.00 °C1,278.00 °C

27 3410

1.2 Boiling Point

3,200.00 °C2,970.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silvery White

White Gray

1.3.3 Luster

NA

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

NA5.50

0.2 8.5

1.4.2 Brinell Hardness

NA590.00 MPa

0.14 3490

1.4.3 Vickers Hardness

NA1,670.00 MPa

121 3430

1.5 Speed of Sound

NA12,890.00 m/s

818 16200

1.6 Optical Properties

1.6.1 Refractive Index

NANA

1.000933 1.7229

1.6.2 Reflectivity

NANA

58 97

1.7 Allotropes

✔ ✘

✔ ✘

1.7.1 α Allotropes

Not Available

Not Available

1.7.2 β Allotropes

Not Available

Not Available

1.7.3 γ Allotropes

Not Available

Not Available

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