Polonium tetranitrate
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| OtherNames = Polonium tetranitrate
|Section1={{Chembox Identifiers
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| index4_label =
| CASNo = 66256-55-1
| ChemSpiderID = 23352125
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| UNII_Ref = {{fdacite|changed|FDA}}
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| EINECS = 266-278-2
| PubChem = 23638965
| SMILES = [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Po]
| StdInChI = 1S/4NO3.Po/c4*2-1(3)4;/q4*-1;
| StdInChIKey = QQOAUYKHHFTXBZ-UHFFFAOYSA-N
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|Section2={{Chembox Properties
| Formula = Po(NO3)4
| MolarMass = 457.00
| Appearance = White crystalline solid
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| Solubility = Soluble}}
|Section3={{Chembox Hazards
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| GHSSignalWord = Warning
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|Section6={{Chembox Related
| OtherCompounds = Americium(III) nitrate
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Polonium tetranitrate is an inorganic compound, a salt of polonium and nitric acid with the chemical formula Po(NO3)4.{{cite journal |last1=Bagnall |first1=K. W. |last2=Robertson |first2=D. S. |last3=Stewart |first3=M. a. A. |title=726. The polonium nitrates |journal=Journal of the Chemical Society |date=1 January 1958 |pages=3633–3636 |doi=10.1039/JR9580003633 |language=en |issn=0368-1769}} The compound is radioactive, forms white crystals.{{cite book |last1=Schmidt |first1=M. |last2=Siebert |first2=W. |last3=Bagnall |first3=K. W. |title=The Chemistry of Sulphur, Selenium, Tellurium and Polonium: Pergamon Texts in Inorganic Chemistry |date=22 October 2013 |publisher=Elsevier |isbn=978-1-4831-5865-5 |page=986 |url=https://books.google.com/books?id=igJPDAAAQBAJ&q=Polonium+tetranitrate&pg=PA986 |access-date=20 August 2021 |language=en}}{{cite book |title=Advances in Inorganic Chemistry and Radiochemistry |date=1 January 1962 |publisher=Academic Press |isbn=978-0-08-057853-8 |page=220 |url=https://books.google.com/books?id=8qePsa3V8GQC&q=Polonium+tetranitrate&pg=PA220 |access-date=20 August 2021 |language=en}}
Synthesis
Dissolution of metallic polonium in concentrated nitric acid:{{cn|date=November 2023}}
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Physical properties
Polonium(IV) nitrate forms white{{cite book |last1=Schweitzer |first1=George K. |last2=Pesterfield |first2=Lester L. |title=The Aqueous Chemistry of the Elements |date=14 January 2010 |publisher=Oxford University Press |isbn=978-0-19-974219-6 |page=243 |url=https://books.google.com/books?id=-TNhhlGcCzwC&q=%22Po%28NO3%294%22+polonium&pg=PA243 |access-date=20 August 2021 |language=en}} or colorless crystals.{{cite book |title=Inorganic Chemistry |date=2012 |publisher=PHI Learning Pvt. Ltd. |isbn=978-81-203-4308-5 |page=494 |url=https://books.google.com/books?id=8KAemlQzOj8C&q=%22Po%28NO3%294%22+polonium&pg=PA494 |access-date=20 August 2021 |language=en}} It dissolves in water with hydrolysis.
Chemical properties
It disproportionates in aqueous weakly acidic nitric acid solutions:
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The polonium(II) ion (Po2+) is then oxidized by nitric acid to polonium(IV).