Physical Properties of Calcium and Rubidium
Boiling Point
1,484.00 °C
  
99+
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Gray
  
Grayish White
  
Luster
NA
  
NA
  
Hardness
  
  
Brinell Hardness
170.00 MPa
  
99+
Speed of Sound
3,810.00 m/s
  
19
1,300.00 m/s
  
99+
Optical Properties
  
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available