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Thallium

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Gadolinium

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Thallium

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Gadolinium

Physical Properties of Thallium and Gadolinium

Thallium Metal

Thallium

Gadolinium Metal

Gadolinium

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1 Physical

1.1 Melting Point

303.50 °C1,311.00 °C

27 3410

1.2 Boiling Point

1,457.00 °C3,233.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silvery White

Silvery White

1.3.3 Luster

NA

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

1.20NA

0.2 8.5

1.4.2 Brinell Hardness

26.50 MPaNA

0.14 3490

1.4.3 Vickers Hardness

NA510.00 MPa

121 3430

1.5 Speed of Sound

818.00 m/s2,680.00 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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