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Strontium sulfate

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Strontium sulfate
Names
IUPAC name Strontium sulfate
Other names Celestine
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.028.955 Edit this at Wikidata
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/H2O4S.Sr/c1-5(2,3)4;/h(H2,1,2,3,4);/q;+2/p-2Key: UBXAKNTVXQMEAG-UHFFFAOYSA-L
  • InChI=1/H2O4S.Sr/c1-5(2,3)4;/h(H2,1,2,3,4);/q;+2/p-2Key: UBXAKNTVXQMEAG-NUQVWONBAV
SMILES
  • .S()(=O)=O
Properties
Chemical formula SrSO4
Molar mass 183.68 g/mol
Appearance white orthorhombic crystals
Density 3.96 g/cm
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
Solubility insoluble in ethanol, alkalis
slightly soluble in acids
Refractive index (nD) 1.622
Structure
Crystal structure Orthorhombic, oP24
Space group Pnma, No. 62
Thermochemistry
Std molar
entropy (S298) 		117.0 J·mol·K
Std enthalpy of
formation (ΔfH298) 		-1453.1 kJ·mol
Hazards
Flash point Non-flammable
Related compounds
Other anions Strontium chloride
Strontium oxide
Other cations Beryllium sulfate
Magnesium sulfate
Calcium sulfate
Barium sulfate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). checkY verify (what is  ?) Infobox references
Chemical compound

Strontium sulfate (SrSN2) 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).

Structure

Strontium sulfate is a polymeric material, isostructural with barium sulfate. Crystallized strontium sulfate is utilized by a small group of radiolarian protozoa, called the Acantharea, as a main constituent of their skeleton.

Applications

Strontium sulfate is of interest as a naturally occurring precursor to other strontium compounds, which are more useful. In industry it is converted to the carbonate for use as ceramic precursor and the nitrate for use in pyrotechnics.


References

  1. Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–87, 1364. ISBN 0849305942.
  2. Patnaik, Pradyot (2003). Handbook of Inorganic Chemical Compounds. McGraw-Hill. pp. 560–576. ISBN 0070494398. Retrieved 2009-06-06.
  3. Krystek, M. (1979). "Lattice Parameters of (BaxSr100-x)SO4 Doped with Europium". Physica Status Solidi (a). 54 (2): K133. doi:10.1002/pssa.2210540256.
  4. J. Paul MacMillan, Jai Won Park, Rolf Gerstenberg, Heinz Wagner, Karl Köhler, Peter Wallbrecht “Strontium and Strontium Compounds” in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a25_321.
Strontium compounds


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