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Beryllium

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Potassium

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Beryllium

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Physical Properties of Beryllium and Potassium

Beryllium Metal

Beryllium

Potassium Metal

Potassium

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1 Physical

1.1 Melting Point

1,278.00 °C63.65 °C

27 3410

1.2 Boiling Point

2,970.00 °C774.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

White Gray

Silvery Gray

1.3.3 Luster

Metallic

NA

1.4 Hardness

1.4.1 Mohs Hardness

5.500.40

0.2 8.5

1.4.2 Brinell Hardness

590.00 MPa0.36 MPa

0.14 3490

1.4.3 Vickers Hardness

1,670.00 MPaNA

121 3430

1.5 Speed of Sound

12,890.00 m/s2,000.00 m/s

818 16200

1.6 Optical Properties

1.6.1 Refractive Index

NANA

1.000933 1.7229

1.6.2 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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