Antarcticite

Antarcticite
Mineralogical name	Antarcticite
Chemical name	Calcium chloride hexahydrate
Trivial name
Chemical formula	CaCl2•6H2O
Other forms
Crystal system	trigonal
Crystal structure
Deliquescence humidity 20°C	33.3% [Steiger etal: 2014]Title: Weathering and Deterioration Author: Steiger, Michael; Charola A. Elena; Sterflinger, Katja
Solubility (g/l) at 20°C	5360 g/l
Density (g/cm³)	1.68 g/cm³
Molar volume	128.0 cm3/mol
Molar weight	219.08 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

Tabelle 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

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