Calcite

Formula : CaCO3

Family: 
Space group: 
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3c
Dana class: 
14.1.1.1 (14) Anhydrous Carbonates (14.1) with Simple Formula A+ CO3 (14.1.1) Calcite Group (Trigonal: R3c)
High temperature: 
Very low temperature mineral <50C in hydrotheral systems
Geological context: 
Widespread mineral in hydrothemal systems and also as a biological secretion.

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
100.087 36.934 -1129109 -1207605 91.780 83.47
Reaction properties

Calcite + H+ ⇌ HCO3- + Ca+2

298.15 K, 1 bar log10K: 1.85 ΔH°r: -25325 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K 2.22 1.85 1.34 0.79 0.11 -0.58 -1.33 -2.24