Co2SiO4

Formula : Co2SiO4

Family: 
Amphiboles

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
209.950 45.350 (Ref.: 82pan) Pankratz L. B., 1982, Thermodynamic Properties of Elements and Oxides (U. S. Bureau of Mines Bulletin 672, 1982, 509 p). -1378424 (Ref.: Internal calculation) -1477000 (Ref.: 82wag/eva) Wagman D.D., Evans W.H., Parker V.B., Schumm R.H., Halow I., Bailey S.M., Churney K.L., and Nutall R.L., 1982. The NBS Tables of Chemical Thermodynamic Properties. J. Phys. Chem. Ref. Data, 11, Suppl. 2. 158.570 (Ref.: 82wag/eva) Wagman D.D., Evans W.H., Parker V.B., Schumm R.H., Halow I., Bailey S.M., Churney K.L., and Nutall R.L., 1982. The NBS Tables of Chemical Thermodynamic Properties. J. Phys. Chem. Ref. Data, 11, Suppl. 2. 134.31 (Ref.: 61kel/kin) Kelley K.K. and King E.G. (1961) U.S. Bureau of Mines Bulletin 500
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.
134.31 0.00 0.00 (Ref.: 61kel/kin) Kelley K.K. and King E.G. (1961) U.S. Bureau of Mines Bulletin 500
Reaction properties

Co2SiO4 + 4H+ ⇌ 2Co+2 + H4SiO4

298.15 K, 1 bar log10K: 7.36 ΔH°r:-97061 J·mol-1 (Ref.: 82wag/eva) Wagman D.D., Evans W.H., Parker V.B., Schumm R.H., Halow I., Bailey S.M., Churney K.L., and Nutall R.L., 1982. The NBS Tables of Chemical Thermodynamic Properties. J. Phys. Chem. Ref. Data, 11, Suppl. 2.
T(°C) 0 25 60 100 150 200 250 300
log10K 8.87 7.36 5.55 3.88 2.23 0.89 -0.28 -1.41
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-1038.817997 -0.146086 63991.738493 369.937088 -3580858.356200