Alabandite

Formula : MnS

Family: 
Space group: 
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m
Dana class: 
2.8.1.4 (2)Sulfides - Including Selenides and Tellurides (2.8) where Am Bn Xp, with (m+n):p=1:1(2.8.1) Galena Group (Isometric: Fm3m)
High temperature: 
Early stages of epithermal systems : 400 to 300C.
Geological context: 
Epithermal sulfide vein deposits. "High" temperature hydrothermal systems generally associated with Mn minerals like Rhodonite, Rhodocrossite.

Dernière mise à jour le 11.06.2018

THERMODYNAMICS

Individual properties (298.15 K)
M
g·mol-1
cm3·mol-1
ΔGºf
J·mol-1
ΔHºf
J·mol-1
J·mol-1·k-1
CP
J·mol-1·K-1
87.004 21.460 -218313 -213462 80.333 49.94
Reaction properties

Alabandite + H+ ⇌ Mn+2 + HS-

298.15 K, 1 bar log10K: -0.00 ΔH°r: -892939 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K 0.35 -0.00 -0.49 -1.02 -1.67 -2.33 -3.07 -3.97