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Ytterbium

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Actinium

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Ytterbium

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Actinium

Physical Properties of Ytterbium and Actinium

Ytterbium Metal

Ytterbium

Actinium Metal

Actinium

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1 Physical

1.1 Melting Point

824.00 °C1,227.00 °C

27 3410

1.2 Boiling Point

1,196.00 °C3,200.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silvery White

Silvery White

1.3.3 Luster

Metallic

NA

1.4 Hardness

1.4.1 Mohs Hardness

NANA

0.2 8.5

1.4.2 Brinell Hardness

343.00 MPaNA

0.14 3490

1.4.3 Vickers Hardness

206.00 MPaNA

121 3430

1.5 Speed of Sound

1,590.00 m/sNA

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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