Sphaerocobaltite

Formula : CoCO3

Family: 
Carbonates
Space group: 
Trigonal - Hexagonal Scalenohedral HM symbol (-3 2/m) Space Group: R 3c
Dana class: 
14.1.1.5V - 14 Anhydrous Carbonates ; 14.1 Anhydrous Carbonates with Simple Formula A+ CO3 ; 14.1.1 Calcite Group (Trigonal: R3_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
118.942 28.252 (Ref.: 90rob/cam) Roberts, Willard L., Campbell, Thomas J., and Rapp, George R.: Encyclopedia of Minerals. (Van Nostrand Reinhold Co., 2nd ed., 1990) -647413 (Ref.: 99gra) Grauer R., 1999. Solubility products of M(II) carbonates. Waste Management laboratory, PSI Bericht Nr. 99-04 January 1999 ISSN 1019-0643. -723408 (Ref.: Internal calculation) 88.620 (Ref.: 74nau/ryz) Naumov G.B., Ryzhenko B.N., and Khodakovsky I.L., 1974. Handbook of Thermodynamic Data. U.S. Geol. Surv.WRD 74 001, 328 pp. 79.50 (Ref.: 74nau/ryz) Naumov G.B., Ryzhenko B.N., and Khodakovsky I.L., 1974. Handbook of Thermodynamic Data. U.S. Geol. Surv.WRD 74 001, 328 pp.
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.
79.50 0.00 0.00 (Ref.: 74nau/ryz) Naumov G.B., Ryzhenko B.N., and Khodakovsky I.L., 1974. Handbook of Thermodynamic Data. U.S. Geol. Surv.WRD 74 001, 328 pp.
Reaction properties

Sphaerocobaltite + H+ ⇌ HCO3- + Co+2

298.15 K, 1 bar log10K: -0.87 ΔH°r:-24122 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K -0.52 -0.87 -1.36 -1.88 -2.50 -3.14 -3.84 -4.70
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-908.489083 -0.145246 50272.923747 329.217932 -2873344.503010