Thenardite

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Thenardite[1][2]
HJS-Na2SO4-111703-02-10x.jpg
Mineralogical name Thenardite
Chemical name Natrium sulphate
Trivial name Pyrotechnite
Chemical formula Na2SO4
Other forms Mirabilite (Na2SO4•10H2O)
Natrium sulphate heptahydrate (Na2SO4•7H2O)
Crystal system {{{Crystal_System}}}
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C
Density (g/cm³) 2,689 g/cm³
Molar volume 53,11 cm3/mol
Molar weight 142,04 g/mol
Transparency
Cleavage
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments soluble in water and glycerin,
not soluble in pure alcohol
Crystal Optics
Refractive Indices nx = 1,468
ny = 1,473
nz = 1,483
Birefringence Δ = 0,015
Optical Orientation positive
Pleochroism
Dispersion
Used Literature
{{{Literature}}}


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