Szomolnokite

Formula : FeSO4:H2O

Family: 
Sulfates
Space group: 
Monoclinic - Prismatic HM symbol (2/m) Space Group: A2/a
Dana class: 
29.6.2.2VI- 29 Hydrated Acid and Sulfates ; 29.6 Hydrated Acid and Sulfates where A XO4 . x(H2O) ; 29.6.2 Kieserite Group (Mono-hydrates)

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
169.926 55.900 (Ref.: 95rob/hem) Robie R.A., and Hemingway B.S., 1995. Thermodynamic properties of minerals and related substances at 298.15 K and 1 Bar (105 Pascals) pressure and at higher temperatures. U.S. Geol. Survey Bull., 2131, 461 pp. -1081138 (Ref.: Internal calculation) -1243700 (Ref.: 02hem/sea) Hemingway, B.S., Seal, R.R., II, and Chou, I-M. (2002) Thermodynamic data for modeling acid mine drainage problems. Part I. Selected soluble iron-sulfate minerals. U.S. Geological Survey Open File Report 02 - 161, 13 p. 157.700 (Ref.: 02hem/sea) Hemingway, B.S., Seal, R.R., II, and Chou, I-M. (2002) Thermodynamic data for modeling acid mine drainage problems. Part I. Selected soluble iron-sulfate minerals. U.S. Geological Survey Open File Report 02 - 161, 13 p.
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.
Reaction properties

Szomolnokite ⇌ Fe+2 + SO4-2 + H2O

298.15 K, 1 bar log10K: -1.66 ΔH°r:-41470 J·mol-1 (Ref.: 02hem/sea) Hemingway, B.S., Seal, R.R., II, and Chou, I-M. (2002) Thermodynamic data for modeling acid mine drainage problems. Part I. Selected soluble iron-sulfate minerals. U.S. Geological Survey Open File Report 02 - 161, 13 p.
T(°C) 0 25 60 100 150 200 250 300
log10K -1.05 -1.66 -2.47 -3.32 -4.29 -5.25 -6.30 -7.62
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-1716.589998 -0.264445 96029.770681 619.885015 -5526775.274996