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Tantalum

☒

Technetium

☒

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Tantalum

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Technetium

Physical Properties of Tantalum and Technetium

Tantalum Metal

Tantalum

Technetium Metal

Technetium

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1 Physical

1.1 Melting Point

2,996.00 °C2,200.00 °C

27 3410

1.2 Boiling Point

5,425.00 °C4,877.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Gray Blue

Shiny Gray

1.3.3 Luster

Metallic

NA

1.4 Hardness

1.4.1 Mohs Hardness

6.50NA

0.2 8.5

1.4.2 Brinell Hardness

440.00 MPaNA

0.14 3490

1.4.3 Vickers Hardness

870.00 MPaNA

121 3430

1.5 Speed of Sound

3,400.00 m/s16,200.00 m/s

818 16200

1.6 Optical Properties

1.6.1 Refractive Index

NANA

1.000933 1.7229

1.6.2 Reflectivity

78.00 %NA

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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