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Physical Properties of Potassium and Rubidium


Physical Properties of Rubidium and Potassium


Physical Properties

Melting Point
63.65 °C   
99+
38.89 °C   
99+

Boiling Point
774.00 °C   
99+
688.00 °C   
99+

Appearance
  
  

Physical State
Solid   
Solid   

Color
Silvery Gray   
Grayish White   

Luster
NA   
NA   

Hardness
  
  

Mohs Hardness
0.40   
23
0.30   
24

Brinell Hardness
0.36 MPa   
99+
0.22 MPa   
99+

Speed of Sound
2,000.00 m/s   
99+
1,300.00 m/s   
99+

Optical Properties
  
  

Allotropes
No   
No   

α Allotropes
Not Available   
Not Available   

β Allotropes
Not Available   
Not Available   

γ Allotropes
Not Available   
Not Available   

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