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Lanthanum

☒

Niobium

☒

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Lanthanum

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Niobium

Physical Properties of Lanthanum and Niobium

Lanthanum Metal

Lanthanum

Niobium Metal

Niobium

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1 Physical

1.1 Melting Point

920.00 °C2,468.00 °C

27 3410

1.2 Boiling Point

3,469.00 °C2,468.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silvery White

Gray

1.3.3 Luster

NA

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

2.506.00

0.2 8.5

1.4.2 Brinell Hardness

350.00 MPa735.00 MPa

0.14 3490

1.3.4 Vickers Hardness

360.00 MPa870.00 MPa

121 3430

1.4 Speed of Sound

2,475.00 m/s3,480.00 m/s

818 16200

1.5 Optical Properties

1.5.1 Refractive Index

NANA

1.000933 1.7229

1.5.2 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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