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Strontium
Strontium

Rubidium
Rubidium



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Strontium
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Rubidium

Physical Properties of Strontium and Rubidium

Physical

Melting Point

769.00 °C38.89 °C
-38.83 3410
👆🏻

Boiling Point

1,384.00 °C688.00 °C
0 5660
👆🏻

Appearance

Physical State

Solid
Solid

Color

Silvery White
Grayish White

Luster

Metallic
-

Hardness

Mohs Hardness

1.500.30
0.2 8.5
👆🏻

Brinell Hardness

110.00 MPa0.22 MPa
0.14 3490
👆🏻

Vickers Hardness

15.00 MPa0.22 MPa
0 3920
👆🏻

Speed of Sound

4,170.00 m/s1,300.00 m/s
818 16200
👆🏻

Optical Properties

Refractive Index

1.431.54
0.155 3.41
👆🏻

Reflectivity

65.00 %52.00 %
5 97
👆🏻

Allotropes

α Allotropes

-
-

β Allotropes

-
-

γ Allotropes

-
-