Mechanical Properties of Promethium and Thallium
Density
  
  
Density At Room Temperature
7.26 g/cm3
  
99+
11.85 g/cm3
  
31
Density When Liquid (at m.p.)
Not Available
  
11.22 g/cm3
  
13
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
NA
  
Ductile, Sectile