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Cobalt

☒

Lanthanum

☒

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Cobalt

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Lanthanum

Physical Properties of Cobalt and Lanthanum

Cobalt Metal

Cobalt

Lanthanum Metal

Lanthanum

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1 Physical

1.1 Melting Point

1,495.00 °C920.00 °C

27 3410

1.2 Boiling Point

2,870.00 °C3,469.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Gray

Silvery White

1.3.3 Luster

Metallic

NA

1.4 Hardness

1.4.1 Mohs Hardness

5.002.50

0.2 8.5

1.4.2 Brinell Hardness

470.00 MPa350.00 MPa

0.14 3490

1.4.3 Vickers Hardness

1,043.00 MPa360.00 MPa

121 3430

1.5 Speed of Sound

4,720.00 m/s2,475.00 m/s

818 16200

1.6 Optical Properties

1.6.1 Refractive Index

NANA

1.000933 1.7229

1.6.2 Reflectivity

67.00 %NA

58 97

1.7 Allotropes

✔ ✘

✔ ✘

1.7.1 α Allotropes

α-Cobalt

Not Available

1.7.2 β Allotropes

β-Cobalt

Not Available

1.7.3 γ Allotropes

Not Available

Not Available

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