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Zirconium

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Thorium

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Zirconium

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Thorium

Physical Properties of Zirconium and Thorium

Zirconium Metal

Zirconium

Thorium Metal

Thorium

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1 Physical

1.1 Melting Point

1,852.00 °C1,750.00 °C

27 3410

1.2 Boiling Point

4,377.00 °C4,790.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silvery White

Silver

1.3.3 Luster

Lustrous

NA

1.4 Hardness

1.4.1 Mohs Hardness

5.003.00

0.2 8.5

1.4.2 Brinell Hardness

638.00 MPa390.00 MPa

0.14 3490

1.4.3 Vickers Hardness

820.00 MPa295.00 MPa

121 3430

1.5 Speed of Sound

3,800.00 m/s2,490.00 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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