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Physical Properties of Rubidium and Rhenium

Rubidium
Rhenium
Physical Properties of Rhenium and Rubidium


Physical Properties
Melting Point
38.89 °C   
99+
3,180.00 °C   
2
Boiling Point
688.00 °C   
99+
5,627.00 °C   
2
Appearance
  
  
Physical State
Solid   
Solid   
Color
Grayish White   
Silvery Gray   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
0.30   
24
7.00   
3
Brinell Hardness
0.22 MPa   
99+
1,320.00 MPa   
8
Vickers Hardness
Not Available   
1,350.00 MPa   
7
Speed of Sound
1,300.00 m/s   
99+
4,700.00 m/s   
15
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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