Monohydrocalcite

Formula : CaCO3:H2O

Family: 
Carbonates
Space group: 
Trigonal - Trapezohedral HM symbol (3 2) Space Group: P 3112
Dana class: 
15.1.3.1V - 15 Hydrated Carbonates ; 15.1 Hydrated Carbonates where A+ (XO3) . x(H2O) ; 14.4.6

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
118.102 48.700 (Ref.: 95rob/hem) Robie R.A., and Hemingway B.S., 1995. Thermodynamic properties of minerals and related substances at 298.15 K and 1 Bar (105 Pascals) pressure and at higher temperatures. U.S. Geol. Survey Bull., 2131, 461 pp. -1361226 (Ref.: 73hul/tur) Hull H. and Turnbull A.J., 1973, A thermochemical study of monohydrocalcite. Geochim. Cosmochim. Acta, 37, 685-694 -1498290 (Ref.: 73hul/tur) Hull H. and Turnbull A.J., 1973, A thermochemical study of monohydrocalcite. Geochim. Cosmochim. Acta, 37, 685-694 128.599 (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

Monohydrocalcite + H+ ⇌ HCO3- + Ca+2 + H2O

298.15 K, 1 bar log10K: 2.73 ΔH°r:-20470 J·mol-1 (Ref.: 73hul/tur) Hull H. and Turnbull A.J., 1973, A thermochemical study of monohydrocalcite. Geochim. Cosmochim. Acta, 37, 685-694
T(°C) 0 25 60 100 150 200 250 300
log10K 3.06 2.73 2.36 2.04 1.72 1.42 1.08 0.59
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-902.502043 -0.137482 49363.013206 327.725641 -2691659.744391