Hellyerite

Formula : NiCO3:6H2O

Family: 
Carbonates
Space group: 
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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
226.794 110.760 (Ref.: 02wal/pre) Wallner, H., Preis, W., Gamsjager, H., 2002. Solid-solute phase equilibria in aqueous solutions: XV [1]. Thermodynamic analysis of the solubility of nickel carbonates. Thermochimica acta 382, 289-296. -2039001 (Ref.: 02wal/pre) Wallner, H., Preis, W., Gamsjager, H., 2002. Solid-solute phase equilibria in aqueous solutions: XV [1]. Thermodynamic analysis of the solubility of nickel carbonates. Thermochimica acta 382, 289-296. -2456374 (Ref.: Internal calculation) 343.000 (Ref.: 02wal/pre) Wallner, H., Preis, W., Gamsjager, H., 2002. Solid-solute phase equilibria in aqueous solutions: XV [1]. Thermodynamic analysis of the solubility of nickel carbonates. Thermochimica acta 382, 289-296. 518.49 (Ref.: 13bla/gab) Blanc P., Gaboreau S. (2013) - Thermoddem : Selection de proprietes thermodynamiques pour les principales especes aqueuses et minerales porteuses de nickel. Rapport final. BRGM/RP-61871-FR. 35 p., 12 fig., 4 tabl.
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.
518.49 0.00 0.00 (Ref.: 13bla/gab) Blanc P., Gaboreau S. (2013) - Thermoddem : Selection de proprietes thermodynamiques pour les principales especes aqueuses et minerales porteuses de nickel. Rapport final. BRGM/RP-61871-FR. 35 p., 12 fig., 4 tabl.
Reaction properties

Hellyerite + H+ ⇌ HCO3- + Ni+2 + 6H2O

298.15 K, 1 bar log10K: 2.82 ΔH°r:-8036 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K 2.92 2.82 2.63 2.38 2.02 1.61 1.09 0.40
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-851.394329 -0.136732 46900.757892 310.587871 -2742840.202077