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Polonium

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Tantalum

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Polonium

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Tantalum

Physical Properties of Polonium and Tantalum

Polonium Metal

Polonium

Tantalum Metal

Tantalum

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1 Physical

1.1 Melting Point

254.00 °C2,996.00 °C

27 3410

1.2 Boiling Point

962.00 °C5,425.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silver

Gray Blue

1.3.3 Luster

NA

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

NA6.50

0.2 8.5

1.4.2 Brinell Hardness

NA440.00 MPa

0.14 3490

1.4.3 Vickers Hardness

NA870.00 MPa

121 3430

1.5 Speed of Sound

NA3,400.00 m/s

818 16200

1.6 Optical Properties

1.6.1 Refractive Index

NANA

1.000933 1.7229

1.6.2 Reflectivity

NA78.00 %

58 97

1.7 Allotropes

✔ ✘

✔ ✘

1.7.1 α Allotropes

α-polonium

Not Available

1.7.2 β Allotropes

β-polonium

Not Available

1.7.3 γ Allotropes

Not Available

Not Available

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