Antarcticite

Formula : CaCl2:6H2O

Space group: 
Trigonal - Trapezohedral HM symbol (3 2) Space Group: P 321
Dana class: 
9.2.6.1IV- 9 Halide Minerals ; 9.2 Anhydrous and Hydrated Halides where A(?)2 ; 9.2.4
High temperature: 
very arid climate
Geological context: 
A precipitate from highly saline brines under very arid conditions

Dernière mise à jour le 19.12.2017

THERMODYNAMICS

Individual properties (298.15 K)
M
g·mol-1
cm3·mol-1
ΔGºf
kJ·mol-1
ΔHºf
kJ·mol-1
J·mol-1·k-1
CP
J·mol-1·K-1
219.074 128.820 -2.215.590 -2.606.130 354.330
Reaction properties

Antarcticite ⇌ Ca+2 + 2Cl- + 6H2O

298.15 K, 1 bar log10K: 3.95 ΔH°r: 13990 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K 3.76 3.95 4.27 4.69 5.23 5.70 6.00 5.97