Physical Properties of Thulium

Thulium

Physical

Melting Point

1,545.00 °C 23

Boiling Point

1,730.00 °C 57

Appearance

Physical State

Solid

Color

Silvery Gray

Luster

Metallic

Hardness

Mohs Hardness

2.25 16

Brinell Hardness

471.00 MPa 30

Vickers Hardness

520.00 MPa 33

Speed of Sound

2,760.00 m/s 43

Optical Properties

Refractive Index

1.60 33

Reflectivity

35.00 % 34

Allotropes

α Allotropes

β Allotropes

γ Allotropes

Lanthanide Series

Promethium
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Europium
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Lanthanum
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Terbium vs Ytterbium
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Dysprosium vs Ytterbium
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Holmium vs Ytterbium
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