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Physical Properties of Potassium and Iron

Potassium
Iron
Physical Properties of Iron and Potassium


Physical Properties
Melting Point
63.65 °C   
99+
1,535.00 °C   
25
Boiling Point
774.00 °C   
99+
2,750.00 °C   
37
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery Gray   
Gray   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
0.40   
23
4.00   
10
Brinell Hardness
0.36 MPa   
99+
200.00 MPa   
40
Vickers Hardness
Not Available   
608.00 MPa   
18
Speed of Sound
2,000.00 m/s   
99+
5,120.00 m/s   
8
Optical Properties
  
  
Reflectivity
Not Available   
65.00 %   
12
Allotropes
No   
Yes   
α Allotropes
Not Available   
Ferrite (alpha Iron)   
β Allotropes
Not Available   
beta Iron   
γ Allotropes
Not Available   
gamma Iron   
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