Jarosite(Pb)

Formula : Pb0.5Fe3(SO4)2(OH)6

Family: 
Alunite
Space group: 
Trigonal - Rhombohedral or Pyramidal HM symbol (3 or -3) Space Group: R 3
Dana class: 
30.2.5.1VI- 30 Anhydrous Sulfates Containing Hydroxyl or Halogen ; 30.2 Anhydrous Sulfates Containing Hydroxyl or Halogen where (A B)2 XO4 Zq ; 30.2.5 Alunite Group (Jarosite Subgroup)

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
565.312 -3037190 (Ref.: 75kas/bor) Kashkai C. M., Borovskaya Y. B., and Badazade M. A. (1975) Determination of DGf,298 of synthetic jarosite and its sulfate analogues. Geokhimiya 7, 771-783 (in Russian).
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

Jarosite(Pb) + 6H+ ⇌ 3Fe+3 + 0.5Pb+2 + 2SO4-2 + 6H2O

298.15 K, 1 bar log10K: -11.45 ΔH°r: J·mol-1 (Ref.: )
T(°C) 0 25 60 100 150 200 250 300
log10K -11.45 -11.45 -11.45 -11.45 -11.45 -11.45 -11.45 -11.45
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-11.447990 0.000000 0.000000 0.000000 0.000000