Antarcticite

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Antarcticite
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	5360 g/l
Density (g/cm³)	1.71 g/cm³
Molar volume	128.0 cm3/mol
Molar weight	219.48 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

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

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)

Literature

[Broul.etal:1981]	Elsevier (eds.) Broul M., Nyvlt J.; Soehnel O. (1981): Solubility in organic two component systems, Elsevier
[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_4.

A phase is a physically distinctive form of matter and is characterized by having relatively uniform chemical and physical properties.