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Gadolinium

☒

Thulium

☒

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Gadolinium

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Thulium

Physical Properties of Gadolinium and Thulium

Gadolinium Metal

Gadolinium

Thulium Metal

Thulium

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1 Physical

1.1 Melting Point

1,311.00 °C1,545.00 °C

27 3410

1.2 Boiling Point

3,233.00 °C1,730.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silvery White

Silvery Gray

1.3.3 Luster

Metallic

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

NANA

0.2 8.5

1.4.2 Brinell Hardness

NA471.00 MPa

0.14 3490

1.4.3 Vickers Hardness

510.00 MPa520.00 MPa

121 3430

1.5 Speed of Sound

2,680.00 m/sNA

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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