Strontium sulfate

Strontium sulfate
Names
	IUPAC name Strontium sulfate
	Other names Celestine
Identifiers
CAS Number	7759-02-6 ;
3D model (JSmol)	Interactive image;
ChemSpider	2341151 ;
ECHA InfoCard	100.028.955
EC Number	231-850-2;
PubChem CID	3084026;
UNII	7Q3KX2L47F ;
CompTox Dashboard (EPA)	DTXSID10884419 ;
	InChI InChI=1S/H2O4S.Sr/c1-5(2,3)4;/h(H2,1,2,3,4);/q;+2/p-2 Key: UBXAKNTVXQMEAG-UHFFFAOYSA-L ; InChI=1/H2O4S.Sr/c1-5(2,3)4;/h(H2,1,2,3,4);/q;+2/p-2 Key: UBXAKNTVXQMEAG-NUQVWONBAV;
	SMILES [Sr+2].[O-]S([O-])(=O)=O;
Properties
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
Structure
Crystal structure	Orthorhombic, oP24
Space group	Pnma, No. 62
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)	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). verify (what is ?) Infobox references

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).

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