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Physical Properties of Gold and Tantalum

Gold
Tantalum
Physical Properties of Tantalum and Gold


Physical
Melting Point
1,064.43 °C  
99+
2,996.00 °C  
4
Boiling Point
2,807.00 °C  
37
5,425.00 °C  
4
Appearance
  
  
Physical State
Solid  
Solid  
Color
Gold  
Gray Blue  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
2.50  
15
6.50  
5
Brinell Hardness
194.00 MPa  
99+
440.00 MPa  
33
Vickers Hardness
216.00 MPa  
99+
870.00 MPa  
19
Speed of Sound
2,030.00 m/s  
99+
3,400.00 m/s  
33
Optical Properties
  
  
Refractive Index
0.47  
99+
2.15  
10
Reflectivity
95.00 %  
2
78.00 %  
8
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
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