Troilite

Formula : FeS

Family: 
Sulfides
Space group: 
Hexagonal - Dihexagonal Dipyramidal HM symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Dana class: 
2.8.9.1II- 2 Sulfide Minerals ; 2.8 Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1 ; 2.8.8

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
87.913 19.069 (Ref.: 63wyc) Wyckoff, R.W.G., 1963, Crystal Structures, Second edition, tome 4, Interscience Publishers, New York, p. 320-322. -100400 (Ref.: Internal calculation) -100121 (Ref.: 05wal/pel) Waldner, P., Pelton, A.D. (2005) Thermodynamic modeling of the Fe-S system. Journal of Phase Equilibria and Diffusion 26, 23-38. 60.310 (Ref.: 05wal/pel) Waldner, P., Pelton, A.D. (2005) Thermodynamic modeling of the Fe-S system. Journal of Phase Equilibria and Diffusion 26, 23-38. 50.50 (Ref.: 05wal/pel) Waldner, P., Pelton, A.D. (2005) Thermodynamic modeling of the Fe-S system. Journal of Phase Equilibria and Diffusion 26, 23-38.
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.
-472.97 1091.66 176.00 (Ref.: 05wal/pel) Waldner, P., Pelton, A.D. (2005) Thermodynamic modeling of the Fe-S system. Journal of Phase Equilibria and Diffusion 26, 23-38.
Reaction properties

Troilite + H+ ⇌ Fe+2 + HS-

298.15 K, 1 bar log10K: -3.87 ΔH°r:-6179 J·mol-1 (Ref.: 05wal/pel) Waldner, P., Pelton, A.D. (2005) Thermodynamic modeling of the Fe-S system. Journal of Phase Equilibria and Diffusion 26, 23-38.
T(°C) 0 25 60 100 150 200 250 300
log10K -3.81 -3.87 -4.04 -4.28 -4.65 -5.14 -5.77 -6.64
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-1131.085458 -0.182257 61072.624243 410.809017 -3538615.657700