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Physical Properties of Lanthanum and Tantalum

Lanthanum
Tantalum
Physical Properties of Tantalum and Lanthanum


Physical Properties
Melting Point
920.00 °C   
99+
2,996.00 °C   
4
Boiling Point
3,469.00 °C   
18
5,425.00 °C   
4
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Gray Blue   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
2.50   
14
6.50   
5
Brinell Hardness
350.00 MPa   
30
440.00 MPa   
28
Vickers Hardness
360.00 MPa   
26
870.00 MPa   
12
Speed of Sound
2,475.00 m/s   
37
3,400.00 m/s   
22
Optical Properties
  
  
Reflectivity
Not Available   
78.00 %   
6
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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