Thermal Properties of Protactinium and Actinium
Specific Heat
0.12 J/(kg K)
  
40
0.12 J/(kg K)
  
40
Molar Heat Capacity
Not Available
  
27.20 J/mol·K
  
18
Thermal Conductivity
47.00 W/m·K
  
32
12.00 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Thermal Expansion
9.90 µm/(m·K)
  
40
Not Available
  
Enthalpy
  
  
Enthalpy of Fusion
12.34 kJ/mol
  
28
Not Available
  
Enthalpy of Atomization
Not Available
  
301.00 kJ/mol
  
36
Standard Molar Entropy
198.10 J/mol.K
  
1
56.50 J/mol.K
  
25