Characteristic

Strontium sulfate (SrSO₄) is the sulfate salt of strontium. It is a white crystalline powder and occurs in nature as the mineral celestine. It is poorly soluble in water to the extent of 1 part in 8,800. It is more soluble in dilute HCl and nitric acid and appreciably soluble in alkali chloride solutions (e.g. sodium chloride).

Chemical formula:SrSO₄

Molar mass: 183.68 g/mol

Appearance :white orthorhombic crystals

Density: 3.96 g/cm³

Melting point: 1,606 °C (2,923 °F; 1,879 K)

Solubility in water:0.0135 g/100 mL (25 °C);0.014 g/100 mL (30 °C)

Solubility product (Ksp):3.44 x 10⁻⁷

Solubility: insoluble in ethanol, alkalis;slightly soluble in acids

Magnetic susceptibility (χ):−57.9·10⁻⁶ cm³/mol

Refractive index (nD):1.622

Crystal structure:Orthorhombic

  

Application

 

Strontium sulfate is used as a precursor to other strontium compounds and as ceramic precursor. Its application in nitrate for use in pyrotechnics. Used as a fining agent in crystal glass. It is also used in powder coating, liquid paints and plastics.