Neodymium(III) sulfate

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| Reference = {{Cite web|url=https://www.chemicalbook.com/ChemicalProductProperty_EN_CB1705313.htm|title=Neodymium Sulfate | 13477-91-3}}

| Name = Neodymium(III) sulfate

| IUPACName = Neodymium(III) trisulfate

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| SystematicName =

| OtherNames = {{Unbulleted list

| Neodyous sulfate

| Neodymium sulfate

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| ImageFile =File:Neodym(III)sulfat.JPG

| ImageSize = 200px

| ImageAlt = Several dozen pink, similar-sized rectangular crystals

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| ImageCaption = Neodymium sulfate crystals

| Section1 = {{Chembox Identifiers

| 3DMet =

| Abbreviations =

| Beilstein =

| CASNo = 10101-95-8

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| ChEBI =

| ChemSpiderID = 21241399

| EINECS = 233-262-1

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| MeSHName =

| PubChem = 165814

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| UNNumber =

| UNII = 4Q1946CN7K

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

| StdInChIKey = OJSWEKSDNUORPG-UHFFFAOYSA-H

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

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| Section2 = {{Chembox Properties

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| Appearance = Pink crystals

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| Density = 2.85 g/cm³

| Formula = Nd₂(SO₄)₃

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| MolarMass = 576.7 g/mol

| MeltingPt =

| MeltingPtC = 700

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| pKa =

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| Solubility = 8 g/100 ml (20 °C)

| SolubleOther = Soluble in sulfuric acid

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| Section3 = {{Chembox Structure

| Structure_ref ={{cite book |author1=Donald R. Fitzwater |author2=R. E. Rundle |title=Structure of Neodymium Sulfate Octahydrate |date=1952 |publisher=Ames Laboratory, Iowa State College |location=University of Minnesota |url=https://books.google.com/books?id=t0BIAQAAMAAJ |language=en}}

| Coordination =

| CrystalStruct = Monoclinic

| MolShape =

| SpaceGroup = C2/c

| LattConst_a = 13.76 Å

| LattConst_b = 7.20 Å

| LattConst_c = 18.65 Å

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| Section4 = {{Chembox Thermochemistry

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| Section5 = {{Chembox Explosive

| ShockSens = Not explosive

| FrictionSens = Not explosive

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| Section6 = {{Chembox Pharmacology

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| Section7 = {{Chembox Hazards

| AutoignitionPt = Not flammable

| ExploLimits =

| FlashPt = Not flammable

| LD50 =

| LC50 =

| MainHazards = Irritant

| NFPA-F = 0

| NFPA-H = 1

| NFPA-R = 1

| NFPA-S =

| PEL =

| REL =

| ExternalSDS =

| GHSPictograms = {{GHS07}}

| GHSSignalWord =

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

| PPhrases = {{P-phrases|261|280|304|340|305+351+338|405|501}}

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| Section9 = {{Chembox Related

| OtherAnions = Neodymium nitrate

| OtherCations = Praseodymium(III) sulfate

| OtherFunction =

| OtherFunction_label =

| OtherCompounds = Neodymium sulfate octahydrate

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Neodymium(III) sulfate is a salt of the rare-earth metal neodymium that has the formula Nd₂(SO₄)₃. It forms multiple hydrates, the octa-, penta-, and the dihydrate, which the octahydrate is the most common. This compound has a retrograde solubility, unlike other compounds, its solubility decreases with increasing temperature.{{cite journal |author1=Art. A. Migdisov |author2=V. V. Reukov |author3=A. E. Williams-Jones |title=A spectrophotometric study of neodymium(III) complexation in sulfate solutions at elevated temperatures |journal=Geochimica et Cosmochimica Acta |date=2005 |volume=70 |issue=4 |pages=983–992 |doi=10.1016/j.gca.2005.11.001 |language=en}} This compound is used in glass for extremely powerful lasers.