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Technetium

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Cerium

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Technetium

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Physical Properties of Technetium and Cerium

Technetium Metal

Technetium

Cerium Metal

Cerium

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1 Physical

1.1 Melting Point

2,200.00 °C795.00 °C

27 3410

1.2 Boiling Point

4,877.00 °C3,257.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Shiny Gray

Silvery White

1.3.3 Luster

NA

Lustrous

1.4 Hardness

1.4.1 Mohs Hardness

NA2.50

0.2 8.5

1.4.2 Brinell Hardness

NA186.00 MPa

0.14 3490

1.4.3 Vickers Hardness

NA210.00 MPa

121 3430

1.5 Speed of Sound

16,200.00 m/s2,100.00 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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