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Thorium

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Chromium

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Thorium

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Chromium

Physical Properties of Thorium and Chromium

Thorium Metal

Thorium

Chromium Metal

Chromium

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1 Physical

1.1 Melting Point

1,750.00 °C1,857.00 °C

27 3410

1.2 Boiling Point

4,790.00 °C2,672.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silver

Silver

1.3.3 Luster

NA

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

3.008.50

0.2 8.5

1.4.2 Brinell Hardness

390.00 MPa687.00 MPa

0.14 3490

1.4.3 Vickers Hardness

295.00 MPa1,060.00 MPa

121 3430

1.5 Speed of Sound

2,490.00 m/s5,940.00 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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