Schönite

From Saltwiki
Schönite[1][2]
Mineralogical name Schoenite, Picromerite
Chemical name Potassium magnesium sulfate hexahydrate
Trivial name
Chemical formula K2Mg(SO4)2•6H2O
Other forms
Crystal system monoclinic
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C 250 g/l
Density (g/cm³) 2.03 g/cm3
Molar volume 198.4 cm3/mol
Molar weight 402.72 g/mol
Transparency transparent
Cleavage perfect
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments
Crystal Optics
Refractive Indices nx = 1.4607
ny = 1.4629
nz = 1.4755
Birefringence Δ = 0.0148
Optical Orientation positive
Pleochroism
Dispersion 49.7°
Used Literature
[JCPDS:1991]Title: JCPDS Powder Diffraction File 2 (PDF-2)
Link to Google Scholar
[Dana:1951]Title: Dana's System of Mineralogy
Author: Dana J.D.
Link to Google Scholar


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Weblinks

Literature

[Dana:1951]Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & SonsLink to Google Scholar
[JCPDS:1991] (1991): JCPDS Powder Diffraction File 2 (PDF-2)Link to Google Scholar