Syngenite

Syngenite
Mineralogical name	Syngenite, Kaluszite
Chemical name	Potassium calcium sulfate hydrate
Trivial name
Chemical formula	K2Ca(SO4)2•H2O
Other forms
Crystal system	monoclinic
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C	2.5 g/l
Density (g/cm³)	2.57 g/cm3
Molar volume	127.8 cm3/mol
Molar weight	328.42 g/mol
Transparency	transparent to translucent
Cleavage	perfect to distinct
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments
Crystal Optics
Refractive Indices	nx = 1.501 ny = 1.517 nz = 1.518
Birefringence	Δ = 0.017
Optical Orientation	biaxial negative
Pleochroism
Dispersion
Used 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.