Home > Data consultation > Mineral species
 
Mineral speciesFormula
 CaCl2:2H2OCaCl2:2H2O 
Mineralogy
Space group: Tetragonal Space Group: Unk. 
Dana class: 9.2.5.1IV- 9 Halide Minerals ; 9.2 Anhydrous and Hydrated Halides where A(?)2 ; 9.2.4 
Geological context
High temperature: Stable at room temperature. The structure is very responsive in temperature and/or water-vapor pressure (Sinjarite) 
Geological context: In the natural environment known as hydrophilite. Occurs as product from volcanic fumaroles. 
Thermodynamics
Individual properties
Molar weight: 147.013 g/mol  ΔGºf-1,244,146 J/mol ref.  Sº: 194.93 J/mol/K ref. 
  ΔHºf-1,404,030 J/mol ref.   
Reaction properties
Chemical reaction:  CaCl2:2H2O = Ca+2 + 2Cl- + 2H2O 
log10(Keq) = A + B.T + C.T-1 + D.log10(T) + E.T−2 (with T expressed in Kelvin)
A B C D E
 -1.55585814e+3   -2.42355187e-1   8.66279832e+4   5.65811472e+2   -4.84888314e+6 
Van t'Hoff
@ 25°C, 1 bar: log 10(Keq)7.95
ΔH°r-44,790 J/mol ref.
T (ºC) : 0 25 60 100 150 200 250 300
log 10(Keq):  8.64   7.95   7.10   6.26   5.33   4.45   3.49   2.28 

Home | Legal information | Private area | Contact us | RSS 2.0 BRGM − 3, avenue Claude Guillemin − 45060 Orléans Cedex 2