Antarcticite

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Antarcticite[1][2]
HJS Ca(Cl)2 100903-10-7.jpg
Mineralogical name Antarcticite
Chemical name Calcium chloride hexahydrate
Trivial name
Chemical formula CaCl2•6H2O
Other forms CaCl2•2H2O (Sinjarite)
CaCl2•4H2O (Calcium chloride tetrahydrate)
Crystal system trigonal
Crystal structure
Deliquescence humidity 20°C 33.3%
Solubility (g/l) at 20°C 6.712 mol/kg
Density (g/cm³) 1.71 g/cm³
Molar volume 128.0 cm3/mol
Molar weight 219.07 g/mol
Transparency transparent
Cleavage perfect
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments hygroscopic and deliquescent
Crystal Optics
Refractive Indices no =1.417-1.494
ne = 1.393-1.550
Birefringence Δ= 0.024
Optical Orientation negative
Pleochroism
Dispersion
Used Literature
[Steiger.etal:2014]Title: Weathering and Deterioration
Author: Steiger, Michael; Charola A. Elena; Sterflinger, Katja
Link to Google Scholar
[Broul.etal:1981]Title: Solubility in organic two component systems
Author: Broul M., Nyvlt J.; Soehnel O.
Link to Google Scholar



Hygroscopicity


Table 1: Deliquescence humidities of antarcticite at different round temperatures [Steiger.etal:2014]Title: Weathering and Deterioration
Author: Steiger, Michael; Charola A. Elena; Sterflinger, Katja
Link to Google Scholar
0°C 10°C 20°C 30°C 40°C 50°C
44.3%r.h. 39.4%r.h. 33.3%r.h. 21.6%r.h. (CaCl2•4H2O) 18.4%r.h. (CaCl2•4H2O) 16.3%r.h. (CaCl2•2H2O)


Weblinks

Literature

[Broul.etal:1981]Elsevier (eds.) Broul M., Nyvlt J.; Soehnel O. (1981): Solubility in organic two component systems, ElsevierLink to Google Scholar
[Steiger.etal:2014]Steiger, Michael; Charola A. Elena; Sterflinger, Katja (2014): Weathering and Deterioration. In: Siegesmund S.; Snethlage R. (eds.): Stone in Architecture, Springer Verlag Berlin Heidelberg, 223-316, 10.1007/978-3-642-45155-3_4Link to Google Scholar