Strontium sulfate

Strontium sulfate

Names
IUPAC name Strontium sulfate
Other names Celestine
Identifiers
CAS Number	7759-02-6 Y
3D model (JSmol)	Interactive image
ChemSpider	2341151 Y
ECHA InfoCard	100.028.955
EC Number	231-850-2
PubChem CID	3084026
UNII	7Q3KX2L47F N
CompTox Dashboard (EPA)	DTXSID10884419
InChI InChI=1S/H2O4S.Sr/c1-5(2,3)4;/h(H2,1,2,3,4);/q;+2/p-2 Y Key: UBXAKNTVXQMEAG-UHFFFAOYSA-L Y 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−1
Appearance	white orthorhombic crystals
Density	3.96 g/cm3
Melting point	1,606 °C (2,923 °F; 1,879 K)
Solubility in water	0.00138 g/100 mL
Solubility product (Ksp)	3.44×10−7
Solubility	slightly soluble in acids
Band gap	5.92 eV
Magnetic susceptibility (χ)	−57.9×10−6 cm3/mol
Refractive index (nD)	1.622
Structure
Crystal structure	Orthorhombic
Space group	Pnma, No. 62
Point group	mmm
Lattice constant	a = 5.34 Å, b = 6.87 Å, c = 8.36 Å α = 90°, β = 90°, γ = 90°
Lattice volume (V)	306.72 Å3
Formula units (Z)	4
Thermochemistry
Std molar entropy (S⦵298)	117.0 J⋅mol−1·K-1
Std enthalpy of formation (ΔfH⦵298)	−1453.1 kJ⋅mol−1
Gibbs free energy (ΔfG⦵)	−1340.9 kJ⋅mol−1
Enthalpy of fusion (ΔfH⦵fus)	36 kJ⋅mol−1
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H315, H319, H335
Precautionary statements	P261, P305+P351+P338
NFPA 704 (fire diamond)	0 0 0
Related compounds
Other anions	Strontium chloride Strontium oxide Strontium sulfite
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 YN ?) 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 very poorly soluble in water.