Strontium sulfate

Strontium sulfate[1]
Names
IUPAC name
Strontium sulfate
Other names
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.028.955 Edit this at Wikidata
EC Number
  • 231-850-2
UNII
  • InChI=1S/H2O4S.Sr/c1-5(2,3)4;/h(H2,1,2,3,4);/q;+2/p-2 checkY
    Key: UBXAKNTVXQMEAG-UHFFFAOYSA-L checkY
  • InChI=1/H2O4S.Sr/c1-5(2,3)4;/h(H2,1,2,3,4);/q;+2/p-2
    Key: UBXAKNTVXQMEAG-NUQVWONBAV
  • [Sr+2].[O-]S([O-])(=O)=O
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)
3.44 x 10−7
Solubility insoluble in ethanol, alkalis
slightly soluble in acids
−57.9·10−6 cm3/mol
1.622[2]
Structure
Orthorhombic, oP24
Pnma, No. 62[3]
Thermochemistry
117.0 J·mol−1·K−1
-1453.1 kJ·mol−1
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
0
0
Flash point Not flammable
Safety data sheet (SDS) External MSDS data
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 [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

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).

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 and chemistry

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.[4]

The low aqueous solubility of strontium sulfate can lead to scale formation in processes where these ions meet. For example, it can form on surfaces of equipment in underground oil wells depending on the groundwater conditions.[5][6]

References

  1. ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–87, 1364. ISBN 0-8493-0594-2.
  2. ^ Patnaik, Pradyot (2003). Handbook of Inorganic Chemical Compounds. McGraw-Hill. pp. 560–576. ISBN 0-07-049439-8. Retrieved 2009-06-06.
  3. ^ Krystek, M. (1979). "Lattice Parameters of (BaxSr100-x)SO4 Doped with Europium". Physica Status Solidi A. 54 (2): K133. Bibcode:1979PSSAR..54..133K. 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.
  5. ^ Jacques, Donald F.; Bourland, Brent I. (1983). "A Study of Solubility of Strontium Sulfate". Society of Petroleum Engineers Journal. 23 (2): 292–300. doi:10.2118/9625-PA.
  6. ^ Dean, S. W.; Ezuber, Hosni M. (2007). "Prediction of Strontium Sulfate Scale Formation in Oilfield Environment". Journal of ASTM International. 4 (6): 100958. doi:10.1520/JAI100958.

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