kb = 8.6e-5  # eV/K
kb_inv = 1.0 / kb
R_gasconst = 8.3144621  # J/mol/K
T0_Kelvin = 273.15

XiO2 = 0.209  # Mean atmospheric O2 mixing ratio


kPa_per_atm = 101.325

kb = 8.6e-5  # eV/K
kb_inv = 1.0 / kb
R_gasconst = 8.3144621  # J/mol/K
T0_Kelvin = 273.15

XiO2 = 0.209  # Mean atmospheric O2 mixing ratio


kPa_per_atm = 101.325

# eV/K # J/mol/K # Mean atmospheric O2 mixing ratio