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