Greenockite

Formula : CdS

Family: 
Sulfides
Space group: 
Hexagonal - Dihexagonal Pyramidal HM symbol (6mm) Space Group: P 63mc
Dana class: 
2.8.7.2II- 2 Sulfide Minerals ; 2.8 Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1 ; 2.8.7 Wurtzite Group (Hexagonal: P63mc)

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
144.476 29.930 (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. -150083 (Ref.: Internal calculation) -148790 (Ref.: 06deo/nav) Deore S., and Navrotsky A., 2006. Oxide melt solution calorimetry of sulfides: Enthalpy of formation of sphalerite, galena, greenockite, and hawleyite. American Mineralogist, 91, p. 400 403. 88.190 (Ref.: 06bla/pia) Blanc P., Piantone P., Lassin A. et Burnol A., 2006. Thermochimie : Selection de constantes thermodynamiques pour les elements majeurs, le plomb et le cadmium. Rapport final. Rapport BRGM 54902-FR 47.35 (Ref.: 99yun/glu) Yungman V.S., and Glusko V.P., 1999. Thermal constants of substances. Wiley, Begell House, New York.
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.
48.79 6.29 -2.95 (Ref.: 99yun/glu) Yungman V.S., and Glusko V.P., 1999. Thermal constants of substances. Wiley, Begell House, New York.
Reaction properties

Greenockite + H+ ⇌ Cd+2 + HS-

298.15 K, 1 bar log10K: -14.82 ΔH°r:56570 J·mol-1 (Ref.: 06deo/nav) Deore S., and Navrotsky A., 2006. Oxide melt solution calorimetry of sulfides: Enthalpy of formation of sphalerite, galena, greenockite, and hawleyite. American Mineralogist, 91, p. 400 403.
T(°C) 0 25 60 100 150 200 250 300
log10K -15.76 -14.82 -13.82 -12.99 -12.29 -11.89 -11.75 -11.92
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-934.069176 -0.148899 47625.640647 338.422230 -2977699.683902