Bischofite

Bischofite
Mineralogical name	Bischofite
Chemical name	Magnesium chloride hexahydrate
Trivial name
Chemical formula	MgCl2•6H2O
Other forms
Crystal system	monoclinic
Crystal structure
Deliquescence humidity 20°C	33.1% [Steiger etal: 2014]Title: Weathering and Deterioration Author: Steiger, Michael; Charola A. Elena; Sterflinger, Katja
Solubility (g/l) at 20°C	543 g/l
Density (g/cm³)	1.56 g/cm3
Molar volume	129.6 cm3/mol
Molar weight	203.33 g/mol
Transparency	transparent to translucent
Cleavage	none
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments	decomposes at 116-118°C hygroscopic and deliquescent
Crystal Optics
Refractive Indices	nx =1.494 ny = 1.507 nz = 1.528
Birefringence	Δ = 0.034
Optical Orientation	positive
Pleochroism
Dispersion
Used Literature
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Hygroscopicity

Table 1: Deliquescence humidities of bischofite at different roud 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
34.1%r.h.	33.7%r.h.	33.1%r.h.	32.4%r.h.	31.5%r.h.	30.5%r.h.

Literature

[Steiger etal: 2014]

Steiger, Michael; Charola A. Elena; Sterflinger, Katja (2014): Weathering and Deterioration. In:: Stone in Architecture, Siegesmund S. and Snethlage R., 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.