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Names | |
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IUPAC name
Strontium sulfate
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Other names | |
Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.028.955 |
EC Number |
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PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
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) |
0.0135 g/100 mL (25 °C) 0.014 g/100 mL (30 °C) | |
Solubility product (Ksp)
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3.44 x 10−7 |
Solubility | insoluble in ethanol, alkalis slightly soluble in acids |
−57.9·10−6 cm3/mol | |
Refractive index (nD)
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1.622[2] |
Structure | |
Orthorhombic, oP24 | |
Pnma, No. 62[3] | |
Thermochemistry | |
Std molar
entropy (S⦵298) |
117.0 J·mol−1·K−1 |
Std enthalpy of
formation (ΔfH⦵298) |
-1453.1 kJ·mol−1 |
Hazards | |
NFPA 704 (fire diamond) | |
Flash point | Not flammable |
Safety data sheet (SDS) | External MSDS data |
Related compounds | |
Other anions
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Strontium chloride Strontium oxide |
Other cations
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Beryllium sulfate Magnesium sulfate Calcium sulfate Barium sulfate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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).