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Polonium

☒

Gadolinium

☒

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Polonium

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Gadolinium

Physical Properties of Polonium and Gadolinium

Polonium Metal

Polonium

Gadolinium Metal

Gadolinium

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1 Physical

1.1 Melting Point

254.00 °C1,311.00 °C

27 3410

1.2 Boiling Point

962.00 °C3,233.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silver

Silvery White

1.3.3 Luster

NA

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

NANA

0.2 8.5

1.4.2 Brinell Hardness

NANA

0.14 3490

1.4.3 Vickers Hardness

NA510.00 MPa

121 3430

1.5 Speed of Sound

NA2,680.00 m/s

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

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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