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Physical Properties of Barium and Polonium

Barium
Polonium
Physical Properties of Polonium and Barium


Physical Properties
Melting Point
725.00 °C   
99+
254.00 °C   
99+
Boiling Point
1,140.00 °C   
99+
962.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery Gray   
Silver   
Luster
NA   
NA   
Hardness
  
  
Mohs Hardness
1.25   
19
Not Available   
Speed of Sound
1,620.00 m/s   
99+
Not Available   
Optical Properties
  
  
Allotropes
No   
Yes   
α Allotropes
Not Available   
α-polonium   
β Allotropes
Not Available   
β-polonium   
γ Allotropes
Not Available   
Not Available   
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