Lithium sulfate

Lithium sulfate
	__ Li+ __ S6+ __ O2−
Names
	IUPAC name Lithium sulfate
	Other names Lithium sulphate
Identifiers
CAS Number	10377-48-7 ; 10102-25-7 (monohydrate) ;
3D model (JSmol)	Interactive image;
ChemSpider	59698 ;
ECHA InfoCard	100.030.734
PubChem CID	66320;
RTECS number	OJ6419000;
UNII	919XA137JK ; KHZ7781670 (monohydrate) ;
CompTox Dashboard (EPA)	DTXSID3049201 ;
	InChI InChI=1S/2Li.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2+1;/p-2 Key: INHCSSUBVCNVSK-UHFFFAOYSA-L ; InChI=1/2Li.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2+1;/p-2 Key: INHCSSUBVCNVSK-NUQVWONBAF;
	SMILES [Li+].[Li+].[O-]S(=O)(=O)[O-];
Properties
Chemical formula	Li2SO4
Molar mass	109.94 g/mol
Appearance	White crystalline solid, hygroscopic
Density	2.221 g/cm3 (anhydrous) ; 2.06 g/cm3 (monohydrate)
Melting point	859 °C (1,578 °F; 1,132 K)
Boiling point	1,377 °C (2,511 °F; 1,650 K)
Solubility in water	monohydrate: ; 34.9 g/100 mL (25 °C) ; 29.2 g/100 mL (100 °C)
Solubility	insoluble in absolute ethanol, acetone and pyridine
Magnetic susceptibility (χ)	−40.0·10−6 cm3/mol
Refractive index (nD)	1.465 (β-form)
Structure
Crystal structure	Primitive monoclinic
Space group	P 21/a, No. 14
Lattice constant	a = 8.239 Å, b = 4.954 Å, c = 8.474 Å α = 90°, β = 107.98°, γ = 90°
Lattice volume (V)	328.9 Å3
Formula units (Z)	4
Coordination geometry	Tetrahedral at sulfur
Thermochemistry
Heat capacity (C)	1.07 J/g K
Std molar; entropy (S⦵298)	113 J/mol K
Std enthalpy of; formation (ΔfH⦵298)	−1436.37 kJ/mol
Gibbs free energy (ΔfG⦵)	−1324.7 kJ/mol
Hazards
NFPA 704 (fire diamond)	2 0 0
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	613 mg/kg (rat, oral)
Related compounds
Other anions	Lithium chloride
Other cations	Sodium sulfate; Potassium sulfate; Rubidium sulfate; Caesium 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

Lithium sulfate is a white inorganic salt with the formula Li₂S O₄. It is the lithium salt of sulfuric acid.