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Erbium

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Potassium

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Erbium

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Physical Properties of Erbium and Potassium

Erbium Metal

Erbium

Potassium Metal

Potassium

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1 Physical

1.1 Melting Point

1,522.00 °C63.65 °C

27 3410

1.2 Boiling Point

2,510.00 °C774.00 °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

Lustrous

NA

1.4 Hardness

1.4.1 Mohs Hardness

NA0.40

0.2 8.5

1.4.3 Brinell Hardness

814.00 MPa0.36 MPa

0.14 3490

1.4.6 Vickers Hardness

589.00 MPaNA

121 3430

1.5 Speed of Sound

2,830.00 m/s2,000.00 m/s

818 16200

1.6 Optical Properties

1.6.1 Refractive Index

NANA

1.000933 1.7229

1.6.3 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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