Hemicarboaluminate

Formula : Ca₈Al₄CO₁₆:22H₂O

Family:

High temperature:

Possible at room temperature

Geological context:

Aluminate phase found in Al-rich cement pastes

Dernière mise à jour le 25.01.2021

Individual properties (298.15 K)

M g·mol^-1	V° cm³·mol^-1	ΔGº_f J·mol^-1	ΔHº_f J·mol^-1	Sº J·mol^-1·k^-1	C_P J·mol^-1·K^-1
1092.890	569.020 (Ref.: 97tay) Taylor H.F.W. , 1997 Cement Chemistry, 2nd. Ed., Thomas Telford, London.	-14211427 (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.	-15987034 (Ref.: Internal calculation)	1269.090 (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.	1531.53 (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.

C_P(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.
1531.53	0.00	0.00	(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.

Reaction properties

Hemicarboaluminate + 27H⁺ ⇌ 4Al⁺³ + HCO₃^- + 8Ca⁺² + 35H₂O

298.15 K, 1 bar log₁₀K: 183.70 ΔH°_r:-1204546 J·mol^-1

T(°C)	0	25	60	100	150	200	250	300
log₁₀K	203.07	183.70	161.65	141.76	122.27	106.70	93.51	81.56

log₁₀K(T) = A + B·T + C·T^-1 + D·log₁₀(T) + E·T⁻² (T in Kelvin)

A	B	C	D	E
-4833.544719	-0.745303	313683.976549	1753.197193	-13406998.223526