Dolomite(ordered)

Formula : CaMg(CO3)2

Family: 
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: 
Less soluble than desordered dolomite. No data about natural occurrences.
Geological context: 
Sedimentary to magmatic mineral

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

Reaction properties

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

298.15 K, 1 bar log10K: 2.75 ΔH°r:-60916 J·mol-1 (Ref.: 78hel/del,92ajoh)
T(°C) 0 25 60 100 150 200 250 300
log10K 3.67 2.75 1.56 0.31 -1.16 -2.61 -4.17 -6.02