Hydrocalumnite(Cr)

Formula : (CaCrO4)Al2O3(CaO)3:15H2O

Family: 
LDH
Space group: 
Monoclinic - Sphenoidal HM symbol (2) Space Group: P 21
Dana class: 
6.4.4.1VI - 6 Hydroxides and Oxides Containing Hydroxyl ; 6.4 Hydroxides and Oxides Containing Hydroxyl containing multiple cations ; 6.4.2

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
696.464 -8483554 (Ref.: 01per/pal) Perkins R.B. and Palmer C.D., 2001. Solubility of chromate hydrocalumite (3CaO.Al2O3.CaCrO4.nH2O) at 5-75C. Cement and Concrete Research, 31, pp. 983-992. -9588782 (Ref.: 01per/pal) Perkins R.B. and Palmer C.D., 2001. Solubility of chromate hydrocalumite (3CaO.Al2O3.CaCrO4.nH2O) at 5-75C. Cement and Concrete Research, 31, pp. 983-992. 1064.220 (Ref.: Internal calculation)
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

Hydrocalumnite(Cr) + 12H+ ⇌ 2Al+3 + 4Ca+2 + CrO4-2 + 21H2O

298.15 K, 1 bar log10K: 71.34 ΔH°r:-541448 J·mol-1 (Ref.: 01per/pal) Perkins R.B. and Palmer C.D., 2001. Solubility of chromate hydrocalumite (3CaO.Al2O3.CaCrO4.nH2O) at 5-75C. Cement and Concrete Research, 31, pp. 983-992.
T(°C) 0 25 60 100 150 200 250 300
log10K 80.21 71.34 61.69 53.52 46.11 40.63 36.19 32.06
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-4020.784013 -0.569651 237546.307313 1449.327986 -10759207.966971