Arcanite

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Arcanite[1][2]
Mineralogical name Arcanite
Chemical name Potassium sulphate
Trivial name Sulphate of Potash
Chemical formula K2SO4
Other forms
Crystal system orthorhombic
Crystal structure
Deliquescence humidity 20°C 98,2% (10°C), 97,6% (20°C), 97% (30°C)
Solubility (g/l) at 20°C 111,5 g/l
Density (g/cm³) 2,662 g/cm3
Molar volume 65,5 cm3/mol
Molar weight 174,27 g/mol
Transparency
Cleavage destinct to good
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments
Crystal Optics
Refractive Indices nx = 1,494
ny = 1,495
nz = 1,497
Birefringence Δ = 0,003
Optical Orientation positive
Pleochroism
Dispersion
Used Literature
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