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Promethium

☒

Erbium

☒

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Promethium

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Erbium

Physical Properties of Promethium and Erbium

Promethium Electron Configuration

Promethium

Erbium Metal

Erbium

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1 Physical

1.1 Melting Point

1,042.00 °C1,522.00 °C

27 3410

1.2 Boiling Point

3,000.00 °C2,510.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Unknown

Silvery White

1.3.3 Luster

Metallic

Lustrous

1.4 Hardness

1.4.1 Mohs Hardness

NANA

0.2 8.5

1.4.2 Brinell Hardness

NA814.00 MPa

0.14 3490

1.4.3 Vickers Hardness

NA589.00 MPa

121 3430

1.5 Speed of Sound

NA2,830.00 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

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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Promethium Electron Configuration

Praseodymium Metal

Promethium vs Praseodymium

Promethium Electron Configuration

Lutetium Metal

Promethium vs Lutetium

Promethium Electron Configuration

Holmium Metal

Promethium vs Holmium

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Erbium Metal

Dysprosium Metal

Erbium vs Dysprosium

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Erbium vs Terbium

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Erbium Metal

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Erbium vs Ytterbium

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