Terbium(III) oxalate

{{Chembox

| Name =

| ImageFileL1 = Tb3+.svg

| ImageSizeL1 = 62px

| ImageFileR1 = Tb3+.svg

| ImageSizeR1 = 62px

| ImageFileL2= Oxalation.svg

| ImageSizeL2= 176px

| ImageFileR2= Oxalation.svg

| ImageSizeR2= 176px

| ImageFile= Oxalation.svg

| ImageSize= 176px

| ImageAlt =

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| Section1 = {{Chembox Identifiers

| CASNo = 996-33-8

| CASNo_Ref = {{cascite|correct|CAS}}

| ChemSpiderID = 144445

| EC_number = 213-632-9

| PubChem = 164770

| StdInChI=1S/3C2H2O4.2Tb/c3*3-1(4)2(5)6;;/h3*(H,3,4)(H,5,6);;/q;;;2*+3/p-6

| StdInChIKey = JZNKXIAEFQDQDF-UHFFFAOYSA-H

| SMILES = [Tb+3].[Tb+3].[O-]C(=O)C(=O)[O-].[O-]C(=O)C(=O)[O-].[O-]C(=O)C(=O)[O-]

}}

| Section2 = {{Chembox Properties

| Formula = Tb₂(C₂O₄)₃

| MolarMass =

| Appearance = white solid, green under ultraviolet light (decahydrate)

| Density =

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| Section3 = {{Chembox Hazards

| GHS_ref={{cite web |title=Diterbium trioxalate |url=https://pubchem.ncbi.nlm.nih.gov/compound/164770#section=Safety-and-Hazards |website=pubchem.ncbi.nlm.nih.gov |access-date=7 March 2024 |language=en}}

| GHSPictograms = {{GHS05}}{{GHS07}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|302|312|318}}

| PPhrases = {{P-phrases|264|264+265|270|280|301+317|302+352|305+354+338|317|321|330|362+364|501}}

| MainHazards =

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Terbium(III) oxalate is the oxalate of terbium with the chemical formula Tb₂(C₂O₄)₃. Its decahydrate can be obtained by reacting terbium(III) chloride and oxalic acid in an aqueous solution.{{cite journal |last1=Alexander |first1=Dinu |last2=Thomas |first2=Kukku |last3=Sisira |first3=S. |last4=Biju |first4=P.R. |last5=Unnikrishnan |first5=N.V. |last6=Ittyachen |first6=M.A. |last7=Joseph |first7=Cyriac |title=Synthesis and optical characterization of sub-5 nm Terbium oxalate nanocrystals: A novel intense green emitting phosphor |journal=Dyes and Pigments |date=January 2018 |volume=148 |pages=386–393 |doi=10.1016/j.dyepig.2017.09.029}} Its decahydrate gradually loses water when heated and becomes anhydrous. Continued heating obtains terbium(III,IV) oxide.{{cite journal|last1=Wendlandt|first1=W. W.|title=Thermal Decomposition of Rare Earth Metal Oxalates|journal=Analytical Chemistry|volume=31|issue=3|year=1959|pages=408–410|issn=0003-2700|doi=10.1021/ac60147a024}} It decomposes in isolation from air to form terbium(III) oxide. The decomposed gas products are carbon monoxide and carbon dioxide. It reacts with hydrochloric acid to obtain H[Tb(C₂O₄)₂]·6H₂O.Moebius, R.; Matthes, F. The exchange of oxalate ions for chloride ions of the oxalate hydrates of the rare earths and yttrium. Zeitschrift fuer Chemie, 1964. 4 (6): 234-235. ISSN: 0044-2402.