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Technetium

☒

Niobium

☒

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Technetium

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Physical Properties of Technetium and Niobium

Technetium Metal

Technetium

Niobium Metal

Niobium

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1 Physical

1.1 Melting Point

2,200.00 °C2,468.00 °C

27 3410

1.2 Boiling Point

4,877.00 °C2,468.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Shiny Gray

Gray

1.3.3 Luster

NA

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

NA6.00

0.2 8.5

1.4.2 Brinell Hardness

NA735.00 MPa

0.14 3490

1.4.3 Vickers Hardness

NA870.00 MPa

121 3430

1.5 Speed of Sound

16,200.00 m/s3,480.00 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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