C3AH6

Formula : Ca3Al2(OH)12

Family: 
Garnet

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
378.285 149.520 (Ref.: 92wol) Wolery T.J., 1992. EQ3/6: A software Package for Geochemical Modelling of Aqueous Systems: Package Overview and Installation Guide. Technical Report UCRL-MA-110662 PT I ed., Lawrence Livermore National Laboratory (USA). -5020912 (Ref.: 10bbla/bou) Blanc, Ph.; Bourbon, X.; Lassin, A.; Gaucher, E.C. 2010 - Chemical model for cement-based materials: Thermodynamic data assessment for phases other than C-S-H. Cement and Concrete Research, 40, p. 1360-1374. -5551500 (Ref.: 99sch/nav) Schoenitz, M., and Navrotsky, A., 1999, Enthalpy of Formation of Katoite Ca3Al2[(OH)4]3: Energetics of the Hydrogarnet Substitution. American Mineralogist, v. 84, p.389-391 416.762 (Ref.: Internal calculation) 459.35 (Ref.: 79ede/sat) Ederova, J., and Satava, V., 1979, Heat capacities of C3AH6, C4ASH12 and C6AS3H32: Thermochimica Acta, v. 31, p. 126-128
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.
292.09 561.00 0.00 (Ref.: 79ede/sat) Ederova, J., and Satava, V., 1979, Heat capacities of C3AH6, C4ASH12 and C6AS3H32: Thermochimica Acta, v. 31, p. 126-128
Reaction properties

C3AH6 + 12H+ ⇌ 2Al+3 + 3Ca+2 + 12H2O

298.15 K, 1 bar log10K: 80.33 ΔH°r:-584260 J·mol-1 (Ref.: 99sch/nav) Schoenitz, M., and Navrotsky, A., 1999, Enthalpy of Formation of Katoite Ca3Al2[(OH)4]3: Energetics of the Hydrogarnet Substitution. American Mineralogist, v. 84, p.389-391
T(°C) 0 25 60 100 150 200 250 300
log10K 89.72 80.33 69.62 59.90 50.31 42.59 36.03 30.13
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-1785.802920 -0.288035 119705.952366 647.580613 -4611700.380390