Stibnite

Formula : Sb2S3

Family: 
Sulfides
Space group: 
Orthorhombic - Dipyramidal HM symbol (2/m 2/m 2/m) Space Group: Pbnm
Dana class: 
2.11.2.1II- 2 Sulfide Minerals ; 2.11 Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=2:3 ; 2.11.2 Stibnite Group (Orthorhombic: Pbnm)

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
339.718 73.414 (Ref.: 03zot/shi) Zotov A. V., Shikina N. D. and Akinfiev N. N., 2003. Thermodynamic properties of the Sb(III) hydroxide complex Sb(OH)3(aq) at hydrothermal conditions. Geochimica et Cosmochimica Acta, Volume 67, 1821-1836 -149980 (Ref.: 03zot/shi) Zotov A. V., Shikina N. D. and Akinfiev N. N., 2003. Thermodynamic properties of the Sb(III) hydroxide complex Sb(OH)3(aq) at hydrothermal conditions. Geochimica et Cosmochimica Acta, Volume 67, 1821-1836 -151529 (Ref.: Internal calculation) 182.004 (Ref.: 03zot/shi) Zotov A. V., Shikina N. D. and Akinfiev N. N., 2003. Thermodynamic properties of the Sb(III) hydroxide complex Sb(OH)3(aq) at hydrothermal conditions. Geochimica et Cosmochimica Acta, Volume 67, 1821-1836 225.19 (Ref.: 03zot/shi) Zotov A. V., Shikina N. D. and Akinfiev N. N., 2003. Thermodynamic properties of the Sb(III) hydroxide complex Sb(OH)3(aq) at hydrothermal conditions. Geochimica et Cosmochimica Acta, Volume 67, 1821-1836
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.
217.32 -30.68 15.13 (Ref.: 03zot/shi) Zotov A. V., Shikina N. D. and Akinfiev N. N., 2003. Thermodynamic properties of the Sb(III) hydroxide complex Sb(OH)3(aq) at hydrothermal conditions. Geochimica et Cosmochimica Acta, Volume 67, 1821-1836
Reaction properties

Stibnite + 6H2O ⇌ 3HS- + 2Sb(OH)3 + 3H+

298.15 K, 1 bar log10K: -56.21 ΔH°r:309255 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K -61.24 -56.21 -50.64 -45.84 -41.50 -38.51 -36.59 -35.72
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-1368.051903 -0.250179 54369.104033 505.120507 -4071884.125629