Monocarboaluminate

Formula : Ca₄Al₂CO₉:10.₆₈H₂O

Family:

High temperature:

Stable at room temperature.

Geological context:

Cement phase.

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
562.684	261.960 (Ref.: 97tay) Taylor H.F.W. , 1997 Cement Chemistry, 2nd. Ed., Thomas Telford, London.	-7269068 (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.	-8175746 (Ref.: 61ber/new) Berman H.A. and Newman E.S., 1961. Heat of formation of calcium aluminate monocarbonate at 25C, Journal of Research of the National Bureau of Standards. A, Physics and Chemistry, 65, pp. 197-207	602.044 (Ref.: Internal calculation)	730.82 (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.
730.82	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

Monocarboaluminate + 13H⁺ ⇌ 2Al⁺³ + HCO₃^- + 4Ca⁺² + 16.68H₂O

298.15 K, 1 bar log₁₀K: 80.57 ΔH°_r:-530628 J·mol^-1

T(°C)	0	25	60	100	150	200	250	300
log₁₀K	89.10	80.57	70.85	62.07	53.45	46.50	40.52	34.96

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

A	B	C	D	E
-2733.219433	-0.422965	170420.748525	992.202070	-7719499.560281