Bornite(alpha)

Formula : Cu5FeS4

Family: 
Sulfides
Space group: 
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P bca
Dana class: 
2.5.2.1 (2) Sulfides - Including Selenides and Tellurides (2.5) where Am Bn Xp, with (m+n):p=3:2 (2.5.2)Dana Group
High temperature: 
Magmatic to hydrothermal environments : medium to rether high temperature
Geological context: 
Bornite occurs chiefly in mesothermal or magmatic hypogene deposits.

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
501.841 98.730 (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. -394621 (Ref.: Internal calculation) -371600 (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. 398.500 (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. 245.60 (Ref.: 78hel/del,70pan/kin)
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.
208.20 146.78 -5.65 (Ref.: 78hel/del,70pan/kin)
Reaction properties

Bornite(alpha) + 4H+ ⇌ 4Cu+ + Cu+2 + Fe+2 + 4HS-

298.15 K, 1 bar log10K: -107.50 ΔH°r:563866 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 -116.63 -107.50 -97.23 -88.08 -79.43 -73.08 -68.62 -66.00
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-3659.462259 -0.579566 167984.837844 1329.587199 -11434856.149172