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CAS no: 7757-82-6 Formula: Na2SO4 Molecular weight: 142.044ï¼Appearance: White orthorhombic bipyramidal crystalline powder
Density: 2.70 g/cm3
Solubility: 28.1 g/100 g H2O
Enthalpy of formation: -1387.1 kJ/mol
Gibbs energy of formation: -1270.2 kJ/mol
Entropy: 149.6 J/mol K
Heat capacity: 128.2 J/mol K
Occurs in nature as mirabilite and thernadite. The latter is usually deposited as an evaporation product near playas and salt lakes. It is often found in arid regions of nothern Africa and western part of the United Sates. It appears as an efflorescence on arid soil and as a crust in volcanic fumarole deposits.