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Physical Properties of Gold and Rubidium

Gold
Rubidium
Physical Properties of Rubidium and Gold


Physical
Melting Point
1,064.43 °C  
99+
38.89 °C  
99+
Boiling Point
2,807.00 °C  
37
688.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gold  
Grayish White  
Luster
Metallic  
-  
Hardness
  
  
Mohs Hardness
2.50  
15
0.30  
26
Brinell Hardness
194.00 MPa  
99+
0.22 MPa  
99+
Vickers Hardness
216.00 MPa  
99+
0.22 MPa  
99+
Speed of Sound
2,030.00 m/s  
99+
1,300.00 m/s  
99+
Optical Properties
  
  
Refractive Index
0.47  
99+
1.54  
35
Reflectivity
95.00 %  
2
52.00 %  
29
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
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