:Radium carbonate

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| Name = Radium carbonate

| IUPACName = Radium carbonate

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| ImageFileL1 = Radium-ion-3D-vdW.png

| ImageFileR1 = Carbonate-3D-vdW.png

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| CASNo = 7116-98-5

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| CASNo_Ref = {{cite web |url=https://haz-map.com/Agents/1813?referer=BrowseByAlphabet&return_url=%2FAgents%2F(BrowseByAlphabet)%2FR |title= Radium carbonate - Hazardous Agents | Haz-Map |website= Haz-Map |access-date= 2020-11-30}}

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| SMILES = [Ra+2].[O-]C([O-])=O

| StdInChI = 1S/CH2O3.Ra/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2

| StdInChIKey = YPWICUOZSQYGTD-UHFFFAOYSA-L

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| Section2 = {{Chembox Properties

| Formula = {{chem2|RaCO3}}{{cite web |url=https://encyclopedia2.thefreedictionary.com/radium+carbonate |title= Radium carbonate | Article about radium carbonate by The Free Dictionary |website=The Free Dictionary By Farlex |access-date= 2020-11-30}}{{reliable?|date=November 2024}}

| MolarMass = 286.0089 g/mol{{cite web |url=http://chemistry-reference.com/q_compounds.asp?CAS=7116-98-5&language=en |title=RADIUM CARBONATE - (7116-98-5) - Physical Properties • Chemical Properties • Solubility • Uses/Function • Reactions • Thermochemistry |website=Chemistry-Reference.com |access-date=2020-11-30 |archive-date=2017-07-17 |archive-url=https://web.archive.org/web/20170717125057/http://chemistry-reference.com/q_compounds.asp?CAS=7116-98-5&language=en |url-status=dead }}

| Appearance = white powder

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| Solubility = 0.05 g/L (25 °C)

| SolubilityProduct = {{10^|−7.5{{+-}}0.1}} (25 °C)

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| MainHazards = radioactive

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| Section8 = {{Chembox Related

| OtherAnions =

| OtherCations = {{ubl|Beryllium carbonate|Magnesium carbonate|Calcium carbonate|Strontium carbonate|Barium carbonate|Lead(II) carbonate|Zinc carbonate|Cadmium carbonate}}

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Radium carbonate is a chemical compound of radium, carbon, and oxygen, having the chemical formula {{chem2|RaCO3|auto=1}}. It is the radium salt of carbonic acid. It contains radium cations ({{chem2|Ra(2+)}}) and carbonate anions ({{chem2|CO3(2−)}}). This salt is a highly radioactive, amorphous,{{Cite journal |date=July 21, 2023 |title=Disordered Crystal Structure and Anomalously High Solubility of Radium Carbonate |journal=Inorganic Chemistry |doi=10.1021/acs.inorgchem.3c01513 |pmid=37477287 |last1=Matyskin |first1=Artem V. |last2=Ebin |first2=Burçak |last3=Allard |first3=Stefan |last4=Torapava |first4=Natallia |last5=Eriksson |first5=Lars |last6=Persson |first6=Ingmar |last7=Brown |first7=Paul L. |last8=Ekberg |first8=Christian |volume=62 |issue=30 |pages=12038–12049 |pmc=10394661}} white powder that has potential applications in medicine.{{Cite journal |date=17 January 2018 |title=Ra-224 labeling of calcium carbonate microparticles for internal α-therapy: Preparation, stability, and biodistribution in mice |journal=Journal of Labelled Compounds and Radiopharmaceuticals |volume=61 |pages=472–486|doi=10.1002/jlcr.3610 |last1=Westrøm |first1=Sara |last2=Malenge |first2=Marion |last3=Jorstad |first3=Ida Sofie |last4=Napoli |first4=Elisa |last5=Bruland |first5=Øyvind S. |last6=Bønsdorff |first6=Tina B. |last7=Larsen |first7=Roy H. |issue=6 |pmid=29380410 |pmc=6001669 |s2cid=3884756}} It is notable for forming disordered crystals at room temperature and for being approximately 10 times more soluble than its lighter congener barium carbonate. Radium carbonate is one of a few radium compounds which has significantly different properties from corresponding barium compounds. Moreover, radium is the only alkaline-earth metal which forms disordered crystals in its carbonate phase. Even though radium carbonate has very low solubility in water, it is soluble in dilute mineral acids and concentrated ammonium carbonate.{{cite journal |url=https://www.osti.gov/servlets/purl/4560824/|title=The Radiochemistry of Radium|date= 1964|website=Office of Scientific and Technical Information |publisher= |doi=10.2172/4560824 |access-date=2021-01-08|quote= |last1=Salutsky |first1=M. |last2=Kirby |first2=H.|osti=4560824 }}