NaFeS2

Formula : NaFeS2

Family: 
Sulfides

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

Individual properties (298.15 K)
M
g·mol-1
 V°
cm3·mol-1
 ΔGºf
J·mol-1
 ΔHºf
J·mol-1
 Sº
J·mol-1·k-1
 CP
J·mol-1·K-1
142.969 -310966 (Ref.: Internal calculation) -318100 (Ref.: 14las/pia) Lassin, A., Piantone, P., Crouzet, C., Bodenan, F., Blanc, P., 2014. Estimated thermodynamic properties of NaFeS2 and erdite (NaFeS2:2H2O). Applied Geochemistry 45, 14-24. doi:10.1016/j.apgeochem.2014.02.015 118.800 (Ref.: 14las/pia) Lassin, A., Piantone, P., Crouzet, C., Bodenan, F., Blanc, P., 2014. Estimated thermodynamic properties of NaFeS2 and erdite (NaFeS2:2H2O). Applied Geochemistry 45, 14-24. doi:10.1016/j.apgeochem.2014.02.015 97.75 (Ref.: 14las/pia) Lassin, A., Piantone, P., Crouzet, C., Bodenan, F., Blanc, P., 2014. Estimated thermodynamic properties of NaFeS2 and erdite (NaFeS2:2H2O). Applied Geochemistry 45, 14-24. doi:10.1016/j.apgeochem.2014.02.015
CP(T) = a + b·T + ·c·T-2 (T in Kelvin)
a
J·mol-1·K-1
 b * 103
J·mol-1·K-2
 c * 10-5
J·K·mol-1
 Maier Kelley Ref.
97.75 0.00 0.00 (Ref.: 14las/pia) Lassin, A., Piantone, P., Crouzet, C., Bodenan, F., Blanc, P., 2014. Estimated thermodynamic properties of NaFeS2 and erdite (NaFeS2:2H2O). Applied Geochemistry 45, 14-24. doi:10.1016/j.apgeochem.2014.02.015
Reaction properties

NaFeS2 + 0.875H+ + 0.5H2O ⇌ Fe+2 + Na+ + 1.875HS-

298.15 K, 1 bar log10K: -1.23 ΔH°r:-13555 J·mol-1 (Ref.: 14las/pia) Lassin, A., Piantone, P., Crouzet, C., Bodenan, F., Blanc, P., 2014. Estimated thermodynamic properties of NaFeS2 and erdite (NaFeS2:2H2O). Applied Geochemistry 45, 14-24. doi:10.1016/j.apgeochem.2014.02.015
T(°C) 0 25 60 100 150 200 250 300
log10K -1.09 -1.23 -1.57 -2.06 -2.77 -3.63 -4.69 -6.13
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-1842.117749 -0.292694 101593.569536 668.812096 -6002287.862855