Barite

Formula : BaSO4

Family: 
Space group: 
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Dana class: 
28.3.1.1 (28)Anhydrous Acid and Sulfates (28.3) (A++) XO4 (28.3.1) Barite Group
High temperature: 
Probably more than 270C.
Geological context: 
Supergene and hydrothermal mineral.

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
233.404 52.100 -1362156 -1473252 132.214 101.74
Reaction properties

Barite ⇌ Ba+2 + SO4-2

298.15 K, 1 bar log10K: -10.05 ΔH°r: 26335 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K -10.57 -10.05 -9.68 -9.57 -9.76 -10.23 -11.00 -12.16