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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
Phase transition
Chemical behavior
Crystal Optics
Refractive Indices nx = 1.501
ny = 1.516
nz = 1.517
Birefringence Δ = 0.016
Optical Orientation biaxial negative
Dispersion 28.3°
Used Literature
[Lide:1995]Title: CRC Handbook of Chemistry and Physics
Author: Lide D.R.
Link to Google Scholar
[Dana:1951]Title: Dana's System of Mineralogy
Author: Dana J.D.
Link to Google Scholar



[Dana:1951]Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & SonsLink to Google Scholar
[Lide:1995]Lide D.R. (eds.) Lide D.R. (1995): CRC Handbook of Chemistry and Physics, CRC PressLink to Google Scholar