Antarcticite

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
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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.