Dolomite(disordered)

Formula : CaMg(CO3)2

Space group: 
Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3
Dana class: 
14.2.1.1 (14) Anhydrous Carbonates (14.2) with Compound Formula A+ B++ (CO3)2 (14.2.1) Dolomite Group (Trigonal: R3)
High temperature: 
More soluble than ordered dolomite. No data about natural occurrences.
Geological context: 
Sedimentary to magmatic 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
184.401 64.390 -2157335 -2316698 166.691 157.72
Reaction properties

Dolomite(disordered) + 2H+ ⇌ 2HCO3- + Ca+2 + Mg+2

298.15 K, 1 bar log10K: 4.30 ΔH°r: -73162 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K 5.41 4.30 2.88 1.42 -0.26 -1.87 -3.57 -5.54