Berthierite

Formula : FeSb2S4

Family: 
Sulfides
Space group: 
Orthorhombic - Dipyramidal HM symbol (2/m 2/m 2/m) Space Group: Pnam
Dana class: 
3.7.9.3II- 3 Sulfides - Sulfosalts ; 3.7 Sulfides - Sulfosalts where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals ; 3.7.9

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
427.631 90.600 (Ref.: 92sea/rob) Seal R.R., Robie R.A., Barton P.B., and Hemingway B.S. (1992) Superambient heat capacities of synthetic stibnite, berthierite, and chalcostibnite: Revised thermodynamic properties and implications for phase equilibria. Econ. Geol. 87, 1911-1918. -255960 (Ref.: 92sea/rob) Seal R.R., Robie R.A., Barton P.B., and Hemingway B.S. (1992) Superambient heat capacities of synthetic stibnite, berthierite, and chalcostibnite: Revised thermodynamic properties and implications for phase equilibria. Econ. Geol. 87, 1911-1918. -256426 (Ref.: Internal calculation) 245.015 (Ref.: 92sea/rob) Seal R.R., Robie R.A., Barton P.B., and Hemingway B.S. (1992) Superambient heat capacities of synthetic stibnite, berthierite, and chalcostibnite: Revised thermodynamic properties and implications for phase equilibria. Econ. Geol. 87, 1911-1918. 177.09 (Ref.: 92sea/rob) Seal R.R., Robie R.A., Barton P.B., and Hemingway B.S. (1992) Superambient heat capacities of synthetic stibnite, berthierite, and chalcostibnite: Revised thermodynamic properties and implications for phase equilibria. Econ. Geol. 87, 1911-1918.
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.
194.93 1.10 -16.15 (Ref.: 92sea/rob) Seal R.R., Robie R.A., Barton P.B., and Hemingway B.S. (1992) Superambient heat capacities of synthetic stibnite, berthierite, and chalcostibnite: Revised thermodynamic properties and implications for phase equilibria. Econ. Geol. 87, 1911-1918.
Reaction properties

Berthierite + 6H2O ⇌ Fe+2 + 4HS- + 2Sb(OH)3 + 2H+

298.15 K, 1 bar log10K: -61.06 ΔH°r:307851 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K -66.09 -61.06 -55.54 -50.81 -46.62 -43.85 -42.28 -41.97
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-2712.082815 -0.451570 128376.245622 989.932580 -8395054.795950