Physical Properties of Platinum and Tantalum
Physical Properties
Melting Point
1,772.00 °C
16
2,996.00 °C
4
Boiling Point
3,827.00 °C
15
5,425.00 °C
4
Appearance
Physical State
Solid
Solid
Color
Silvery White
Gray Blue
Luster
Metallic
Metallic
Hardness
Mohs Hardness
3.50
11
6.50
5
Brinell Hardness
300.00 MPa
34
440.00 MPa
28
Vickers Hardness
400.00 MPa
25
870.00 MPa
12
Speed of Sound
2,800.00 m/s
29
3,400.00 m/s
22
Optical Properties
Reflectivity
73.00 %
8
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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