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Iridium

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Cobalt

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Iridium

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Cobalt

Physical Properties of Iridium and Cobalt

Iridium Metal

Iridium

Cobalt Metal

Cobalt

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1 Physical

1.1 Melting Point

2,410.00 °C1,495.00 °C

27 3410

1.3 Boiling Point

4,527.00 °C2,870.00 °C

147 5660

2.2 Appearance

2.2.1 Physical State

Solid

Solid

2.2.2 Color

Silvery White

Gray

2.2.3 Luster

Metallic

Metallic

2.3 Hardness

2.3.1 Mohs Hardness

6.505.00

0.2 8.5

2.3.3 Brinell Hardness

1,670.00 MPa470.00 MPa

0.14 3490

2.3.4 Vickers Hardness

1,760.00 MPa1,043.00 MPa

121 3430

2.6 Speed of Sound

4,825.00 m/s4,720.00 m/s

818 16200

2.8 Optical Properties

2.8.1 Refractive Index

NANA

1.000933 1.7229

2.8.3 Reflectivity

78.00 %67.00 %

58 97

2.10 Allotropes

✔ ✘

✔ ✘

2.10.1 α Allotropes

Not Available

α-Cobalt

2.10.2 β Allotropes

Not Available

β-Cobalt

2.10.3 γ Allotropes

Not Available

Not Available

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