Polyhalite

Formula : K2MgCa2(SO4)4:2H2O

Space group: 
Triclinic Space Group: P 1,P1
Dana class: 
29.4.5.1VI- 29 Hydrated Acid and Sulfates ; 29.4 Hydrated Acid and Sulfates where (A+)2 Bn (XO4)p . x(H2O) ; 29.4.5

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
602.943 218.500 -5654733
Reaction properties

Polyhalite ⇌ 2Ca+2 + 2K+ + Mg+2 + 4SO4-2 + 2H2O

298.15 K, 1 bar log10K: -13.74 ΔH°r: J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K -13.74 -13.74 -13.74 -13.74 -13.74 -13.74 -13.74 -13.74