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Platinum

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Tantalum

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Platinum

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Tantalum

Physical Properties of Platinum and Tantalum

Platinum Metal

Platinum

Tantalum Metal

Tantalum

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1 Physical

1.1 Melting Point

1,772.00 °C2,996.00 °C

27 3410

1.2 Boiling Point

3,827.00 °C5,425.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silvery White

Gray Blue

1.3.3 Luster

Metallic

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

3.506.50

0.2 8.5

1.4.2 Brinell Hardness

300.00 MPa440.00 MPa

0.14 3490

1.4.3 Vickers Hardness

400.00 MPa870.00 MPa

121 3430

1.5 Speed of Sound

2,800.00 m/s3,400.00 m/s

818 16200

1.6 Optical Properties

1.6.1 Refractive Index

NANA

1.000933 1.7229

1.6.2 Reflectivity

73.00 %78.00 %

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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