Krausite(Cr)

Formula : KFe(CrO4)2:2H2O

Family: 
Chromate
Space group: 
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m

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
362.903 -2332149 (Ref.: 98bar/pal) Baron D. and Palmer C. D., 1998. Solubility of KFe(CrO4)2-2H2O at 4-75C. Appl. Geochem., 12, pp. 961-973. -2658340 (Ref.: 98bar/pal) Baron D. and Palmer C. D., 1998. Solubility of KFe(CrO4)2-2H2O at 4-75C. Appl. Geochem., 12, pp. 961-973. 332.306 (Ref.: Internal calculation) 563.94 (Ref.: 98bar/pal) Baron D. and Palmer C. D., 1998. Solubility of KFe(CrO4)2-2H2O at 4-75C. Appl. Geochem., 12, pp. 961-973.
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.
563.94 0.00 0.00 (Ref.: 98bar/pal) Baron D. and Palmer C. D., 1998. Solubility of KFe(CrO4)2-2H2O at 4-75C. Appl. Geochem., 12, pp. 961-973.
Reaction properties

Krausite(Cr) ⇌ 2CrO4-2 + Fe+3 + K+ + 2H2O

298.15 K, 1 bar log10K: -19.39 ΔH°r:27540 J·mol-1 (Ref.: 98bar/pal) Baron D. and Palmer C. D., 1998. Solubility of KFe(CrO4)2-2H2O at 4-75C. Appl. Geochem., 12, pp. 961-973.
T(°C) 0 25 60 100 150 200 250 300
log10K -20.05 -19.39 -19.17 -19.52 -20.59 -22.20 -24.36 -27.31
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-3137.322409 -0.518478 171530.762099 1138.531845 -10669098.038758