Lanthanum(III) sulfate

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| OtherNames = {{Unbulleted list

| Lanthanum sulfate

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| Section1 = {{Chembox Identifiers

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| Abbreviations =

| Beilstein =

| CASNo = 10099-60-2

| CASNo_Ref = {{Cascite|correct|CAS}}

| ChEBI =

| ChemSpiderID = 140072

| EC_number = 233-239-6

| Gmelin =

| InChI = 1S/2La.3H2O4S/c;;3*1-5(2,3)4/h;;3*(H2,1,2,3,4)/q2*+3;;;/p-6

| KEGG =

| PubChem = 159259

| UNII = 4636PY459O

| UNNumber = 4636PY459O

| StdInChIKey = VQEHIYWBGOJJDM-UHFFFAOYSA-H

| SMILES = [O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[La+3].[La+3]

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| Section2 = {{Chembox Properties

| AtmosphericOHRateConstant =

| Appearance = White solid{{cite book |editor1-last=Haynes |editor1-first=William |title=CRC Handbook of Chemistry and Physics |date=2016 |publisher=CRC Press |isbn=9781439880500 |page=4-70 |edition=93rd |language=en}}

| BoilingPt =

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| Density = 2.82 g/cm³ (nonahydrate)

| Formula = La₂(SO₄)₃

| HenryConstant =

| LogP =

| MolarMass = 566.00 g/mol

| MeltingPt =

| MeltingPtC = 775

| MeltingPt_ref = {{cite journal |author1=James A. Poston Jr. |author2=Ranjani V. Siriwardane |author3=Edward P. Fisher |author4=Angela L. Miltz |title=Thermal decomposition of the rare earth sulfates of cerium(III), cerium(IV), lanthanum(III) and samarium(III) |journal=Applied Surface Science |date=2003 |volume=214 |issue=1–4 |pages=83–102 |doi=10.1016/S0169-4332(03)00358-1 |bibcode=2003ApSS..214...83P |language=en}}

| MeltingPt_notes= (decomposition)

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| Solubility = 2.7 g/100 mL (20 °C, nonahydrate)

| SolubleOther = insoluble in ethanol

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| Section3 = {{Chembox Structure

| Structure_ref = {{cite journal |author1=Elizabeth Gebert Sherry |title=The structure of Pr2(SO4)3 · 8H2O and La2(SO4)3 · 9H2O |journal=Journal of Solid State Chemistry |date=1976 |volume=19 |issue=3 |pages=271–279 |doi=10.1016/0022-4596(76)90177-8 |language=en}}

| CrystalStruct = hexagonal

| SpaceGroup = P6₃

| LattConst_a = 11.01 Å

| LattConst_b =

| LattConst_c = 8.08 Å

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| Section4 = {{Chembox Thermochemistry

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| Section7 = {{Chembox Hazards

| AutoignitionPt =

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| MainHazards =

| NFPA-H = 0

| NFPA-F = 0

| NFPA-I = 1

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| PEL =

| REL =

| ExternalSDS =

| GHS_ref=[https://pubchem.ncbi.nlm.nih.gov/compound/159259#section=Safety-and-Hazards]

| GHSPictograms = {{GHS07}}

| GHSSignalWord = Warning

| HPhrases = {{H-phrases|315|319|335}}

| PPhrases = {{P-phrases|261|264|264+265|271|280|302+352|304+340|305+351+338|319|321|332+317|337+317|362+364|403+233|405|501}}

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| Section9 = {{Chembox Related

| OtherAnions = Lanthanum(III) nitrate

| OtherCations = Cerium(III) sulfate

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Lanthanum(III) sulfate is an inorganic compound with the formula La₂(SO₄)₃·xH₂O (0 ≥ x ≥ 9). It forms various hydrates, the most common one being the nonahydrate, which are all white solids. It is an intermediate in producing lanthanum from its ores.{{harvp|Greenwood|Earnshaw|1984|pp=1426–1429}}