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Potassium

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Thulium

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Potassium

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Thulium

Physical Properties of Potassium and Thulium

Potassium Metal

Potassium

Thulium Metal

Thulium

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Physical

Melting Point

Boiling Point

Physical State

Color

Luster

Mohs Hardness

Brinell Hardness

Vickers Hardness

Speed of Sound

Refractive Index

Reflectivity

Allotropes

α Allotropes

β Allotropes

γ Allotropes

63.65 °C

774.00 °C

Solid

Silvery Gray

-

0.40

0.36 MPa

100.00 MPa

2,000.00 m/s

1.33

72.00 %

✔✘

-

-

-

1,545.00 °C

1,730.00 °C

Solid

Silvery Gray

Metallic

2.25

471.00 MPa

520.00 MPa

2,760.00 m/s

1.60

35.00 %

✔✘

-

-

-

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Thulium Metal

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Thulium vs Neodymium

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