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Lithium

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Potassium

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Lithium

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Potassium

Physical Properties of Lithium and Potassium

Lithium Metal

Lithium

Potassium Metal

Potassium

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1 Physical

1.1 Melting Point

180.54 °C63.65 °C

27 3410

1.2 Boiling Point

1,347.00 °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

NA

NA

1.4 Hardness

1.4.1 Mohs Hardness

0.600.40

0.2 8.5

1.4.2 Brinell Hardness

5.00 MPa0.36 MPa

0.14 3490

1.4.3 Vickers Hardness

NANA

121 3430

1.5 Speed of Sound

6,000.00 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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Lithium Metal

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