Pentahydrite

Formula : MgSO4:5H2O

Space group: 
Triclinic Pedial or Pinacoidal HM symbol (1 or -1) Space Group: P1
Dana class: 
29.6.7.3VI- 29 Hydrated Acid and Sulfates ; 29.6 Hydrated Acid and Sulfates where A XO4 . x(H2O) ; 29.6.7 Chalchanthite Group (Triclinic: P1_)

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
210.445 109.600 -2392387 -2791303 303.340
Reaction properties

Pentahydrite ⇌ Mg+2 + SO4-2 + 5H2O

298.15 K, 1 bar log10K: -1.27 ΔH°r: -14187 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K -1.04 -1.27 -1.49 -1.59 -1.59 -1.57 -1.66 -2.05