| Strontium sulfate[1] | |
|---|---|
| IUPAC name |
Strontium sulfate
|
| Other names | Celestine |
| Identifiers | |
| CAS number | 7759-02-6  |
| Properties | |
| Molecular formula | SrSO4 |
| Molar mass | 183.68 g/mol |
| Appearance | white orthorhombic crystals |
| Density | 3.96 g/cm3 |
| Melting point |
1606°C |
| 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 |
| Refractive index (nD) | 1.622 [2] |
| Structure | |
| Crystal structure | Orthorhombic, oP24 |
| Space group | Pnma, No. 62 [3] |
| Thermochemistry | |
| Std enthalpy of formation ΔfH |
-1453.1 kJ·mol-1 |
| Standard molar entropy S |
117.0 J·mol-1·K-1 |
| Hazards | |
| MSDS | External MSDS data |
| EU Index | Not listed |
| Flash point | Non-flammable |
| Related compounds | |
| Other anions | Strontium chloride Strontium oxide |
| Other cations | Beryllium sulfate Magnesium sulfate Calcium sulfate Barium sulfate |
| (what is this?) (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
|
| Infobox references | |
Strontium sulfate (SrSO4) is the sulfate salt of strontium. It is a white, odorless, crystalline powder, and occurs in nature as the mineral celestine. It is 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).
Like many strontium compounds, strontium sulfate will produce a bright red flame when burned. For this reason, it is used as a colorant in pyrotechnics. It is also used in ceramics.
Occurrence in biology
Crystallized strontium sulfate is utilized by a small group of radiolarian protozoa, called the Acantharea, as a main constituent of their skeleton.
References
- ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–87; 1364. ISBN 0849305942.
- ^ Patnaik, Pradyot (2003). Handbook of Inorganic Chemical Compounds. McGraw-Hill. pp. 560–576. ISBN 0070494398. http://books.google.com/books?id=Xqj-TTzkvTEC. Retrieved 2009-06-06.
- ^ Krystek M. (1979). "Lattice Parameters of (BaxSr100-x)SO4 Doped with Europium". Physica Status Solidi (a) 54: K133. doi:.
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