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Lanthanum

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Americium

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Lanthanum

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Americium

Physical Properties of Lanthanum and Americium

Lanthanum Metal

Lanthanum

Americium Metal

Americium

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1 Physical

1.1 Melting Point

920.00 °C994.00 °C

27 3410

1.2 Boiling Point

3,469.00 °C2,607.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silvery White

Silvery White

1.3.3 Luster

NA

NA

1.4 Hardness

1.4.1 Mohs Hardness

2.50NA

0.2 8.5

1.4.2 Brinell Hardness

350.00 MPaNA

0.14 3490

1.4.3 Vickers Hardness

360.00 MPaNA

121 3430

1.5 Speed of Sound

2,475.00 m/sNA

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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