Dolomite

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: 
From the weathering to high temperature conditions
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 64.365 -2161707 -2324500 155.185 157.51
Reaction properties

Dolomite + 2H+ ⇌ 2HCO3- + Ca+2 + Mg+2

298.15 K, 1 bar log10K: 3.53 ΔH°r: -65360 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K 4.52 3.53 2.25 0.93 -0.61 -2.12 -3.72 -5.62