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Lutetium

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Tantalum

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Lutetium

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Physical Properties of Lutetium and Tantalum

Lutetium Metal

Lutetium

Tantalum Metal

Tantalum

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1 Physical

1.1 Melting Point

1,652.00 °C2,996.00 °C

27 3410

1.2 Boiling Point

3,402.00 °C5,425.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silvery White

Gray Blue

1.3.3 Luster

Metallic

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

NA6.50

0.2 8.5

1.4.2 Brinell Hardness

893.00 MPa440.00 MPa

0.14 3490

1.4.3 Vickers Hardness

1,160.00 MPa870.00 MPa

121 3430

1.5 Speed of Sound

NA3,400.00 m/s

818 16200

1.6 Optical Properties

1.6.1 Refractive Index

NANA

1.000933 1.7229

1.6.2 Reflectivity

NA78.00 %

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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