Cattierite

Formula : CoS2

Family: 
Sulfides
Space group: 
Isometric - Diploidal HM symbol (2/m -3) Space Group: P a3
Dana class: 
2.12.1.3II- 2 Sulfide Minerals ; 2.12 Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:2 ; 2.12.1 Pyrite Group (Isometric: Pa3)

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
123.065 25.520 (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. -145131 (Ref.: Internal calculation) -150900 (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. 74.800 (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. 68.26 (Ref.: 87pan/mah) Pankratz L. B., 1987, A. D. Mah, and S. W. Watson, Thermodynamic Properties of Sulfides (U. S. Bureau of Mines Bulletin 689, 1987, 427 p).
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.
65.47 30.91 -5.71 (Ref.: 87pan/mah) Pankratz L. B., 1987, A. D. Mah, and S. W. Watson, Thermodynamic Properties of Sulfides (U. S. Bureau of Mines Bulletin 689, 1987, 427 p).
Reaction properties

Cattierite + 0.75H2O ⇌ Co+2 + 1.5HS- + 0.25S2O3-2

298.15 K, 1 bar log10K: -27.18 ΔH°r:120151 J·mol-1 (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.
T(°C) 0 25 60 100 150 200 250 300
log10K -29.19 -27.18 -25.07 -23.34 -21.90 -21.07 -20.77 -21.05
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-1595.679708 -0.258497 80777.162156 579.250911 -5216177.933088