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Niobium

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Terbium

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Niobium

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Terbium

Physical Properties of Niobium and Terbium

Niobium Metal

Niobium

Terbium Metal

Terbium

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1 Physical

1.1 Melting Point

2,468.00 °C1,356.00 °C

27 3410

1.2 Boiling Point

2,468.00 °C3,123.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Gray

Silvery White

1.3.3 Luster

Metallic

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

6.00NA

0.2 8.5

1.4.2 Brinell Hardness

735.00 MPa677.00 MPa

0.14 3490

1.4.3 Vickers Hardness

870.00 MPa863.00 MPa

121 3430

1.5 Speed of Sound

3,480.00 m/s2,620.00 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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