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Chromium

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Niobium

☒

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Chromium

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Niobium

Physical Properties of Chromium and Niobium

Chromium Metal

Chromium

Niobium Metal

Niobium

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1 Physical

1.1 Melting Point

1,857.00 °C2,468.00 °C

27 3410

1.2 Boiling Point

2,672.00 °C2,468.00 °C

147 5660

1.3 Appearance

1.3.1 Physical State

Solid

Solid

1.3.2 Color

Silver

Gray

1.3.3 Luster

Metallic

Metallic

1.4 Hardness

1.4.1 Mohs Hardness

8.506.00

0.2 8.5

1.4.2 Brinell Hardness

687.00 MPa735.00 MPa

0.14 3490

1.4.3 Vickers Hardness

1,060.00 MPa870.00 MPa

121 3430

1.5 Speed of Sound

5,940.00 m/s3,480.00 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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