View source for Praseodymium(III) phosphate

{{Chembox
| Name = 
| ImageFile =[[File:Pr3+.svg]][[File:Phosphat-Ion.svg]]
| ImageAlt = 
| IUPACName = 
| OtherNames = 
| Section1 = {{Chembox Identifiers
|   CASNo = 14298-31-8
|   CASNo_Ref = {{cascite|correct|CAS}}
| EC_number = 238-231-6
|   PubChem = 3084189
| StdInChI=1S/H3O4P.Pr/c1-5(2,3)4;/h(H3,1,2,3,4);/q;+3/p-3
| StdInChIKey = KDCUNMWWJBHRSC-UHFFFAOYSA-K
| SMILES = [O-]P(=O)([O-])[O-].[Pr+3] 
  }}
| Section2 = {{Chembox Properties
| Pr=1 | P=1 | O=4
|   Appearance = solid
|   Density = 
|   MeltingPt = 
|   BoilingPt = 
|   Solubility =  }}
| Section3 = {{Chembox Hazards
| GHS_ref=<ref>{{cite web |title=Praseodymium(III) phosphate |url=https://pubchem.ncbi.nlm.nih.gov/compound/3084189#section=Safety-and-Hazards |website=pubchem.ncbi.nlm.nih.gov |language=en}}</ref>
| 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}}
|   MainHazards = 
|   FlashPt = 
 }}
}}

'''Praseodymium(III) phosphate''' is an [[inorganic compound]] with the [[chemical formula]] PrPO<sub>4</sub>. 

== Preparation ==

Praseodymium(III) phosphate hemihydrate can be obtained by reacting [[praseodymium chloride]] and [[phosphoric acid]]:<ref>{{Cite journal |last1=Hikichi |first1=Yasuo |last2=Hukuo |first2=Ken-iti |last3=Shiokawa |first3=Jiro |date=Dec 1978 |title=Syntheses of Rare Earth Orthophosphates |url=http://dx.doi.org/10.1246/bcsj.51.3645 |journal=Bulletin of the Chemical Society of Japan |volume=51 |issue=12 |pages=3645–3646 |doi=10.1246/bcsj.51.3645 |issn=0009-2673}}</ref>

:{{chem2|PrCl3 + H3PO4 ->  PrPO4 + 3 HCl}}

It can also be produced by reacting [[silicon pyrophosphate]] (SiP<sub>2</sub>O<sub>7</sub>) and [[praseodymium(III,IV) oxide]] (Pr<sub>6</sub>O<sub>11</sub>) at 1200&nbsp;°C.<ref>{{cite journal|journal=Journal of the American Ceramic Society|volume=66|issue=11|language=en|issn=0002-7820|date=Nov 1983|pages=c208–c209|doi=10.1111/j.1151-2916.1983.tb10575.x|url=https://onlinelibrary.wiley.com/doi/10.1111/j.1151-2916.1983.tb10575.x|title=Synthesis of Metal Phosphates Using SiP2O7|accessdate=2022-03-06|author=Carlos E. Bamberger, George M. Begun, Dale E. Heatherly}}</ref>

== Properties ==

Praseodymium(III) phosphate forms light green crystals in the [[monoclinic crystal system]], with [[space group]] ''P2<sub>1</sub>/n'' and cell parameters ''a'' = 0.676 nm, ''b'' = 0.695 nm, ''c'' = 0.641 nm, β = 103.25°, Z = 4.<ref>{{Citation |last=Garkavi |first=Andrey Vladimirovich |title=How to Draw up and Complete a Dissertation, 2nd ed., revised and enlarged |chapter=How to Draw Up and Complete a Dissertation, 2nd ed., revised and enlarged |date=2023 |chapter-url=http://dx.doi.org/10.33029/9704-7930-8-hdc-2023-1-80 |pages=1–80 |access-date=2023-12-06 |publisher=OOO "GEOTAR-Media" Publishing Group |doi=10.33029/9704-7930-8-hdc-2023-1-80 |isbn=978-5-9704-7930-8}}</ref><ref>{{Cite journal |last1=Horchani-Naifer |first1=K. |last2=Férid |first2=M. |date=2009-04-20 |title=Crystal structure, energy band and optical characterizations of praseodymium monophosphate PrPO4 |url=https://www.sciencedirect.com/science/article/pii/S0020169308005422 |journal=Inorganica Chimica Acta |volume=362 |issue=6 |pages=1793–1796 |doi=10.1016/j.ica.2008.08.021 |issn=0020-1693}}</ref>

It forms a crystal hydrate of the composition PrPO<sub>4</sub>·''n''H<sub>2</sub>O, where n < 0.5, with light green crystals of [[hexagonal crystal system]], space group ''P6<sub>2</sub>22'', and cell parameters ''a'' = 0.700 nm, ''c'' = 0.643 nm, Z = 3.<ref>{{Cite book |url=http://dx.doi.org/10.52070/978-5-00120-359-9_2022 |title=Инязовские чтения. Сборник научных статей Первой международной научно-практической конференции Совета молодых ученых МГЛУ |date=2022 |publisher=Московский государственный лингвистический университет |isbn=978-5-00120-359-9 |location=Москва |doi=10.52070/978-5-00120-359-9_2022 |lang=ru}}</ref><ref>{{Cite journal |last1=Hezel |first1=A. |last2=Ross |first2=S. D. |date=1967-08-01 |title=X-ray powder data and cell dimensions of some rare earth orthophosphates |url=https://dx.doi.org/10.1016/0022-1902%2867%2980469-X |journal=Journal of Inorganic and Nuclear Chemistry |volume=29 |issue=8 |pages=2085–2089 |doi=10.1016/0022-1902(67)80469-X |issn=0022-1902}}</ref>

Praseodymium(III) phosphate reacts with [[sodium fluoride]] to obtain Na<sub>2</sub>PrF<sub>2</sub>(PO<sub>4</sub>).<ref>{{Cite journal |last1=ZIMINA |first1=G. V. |last2=SMIRNOVA |first2=I. N. |last3=GORKOVENKO |first3=M. YU. |last4=SPIRIDONOV |first4=F. M. |last5=KOMISSAROVA |first5=L. N. |last6=KALOEV |first6=N. I. |date=1995-02-21 |title=ChemInform Abstract: Synthesis and Studies of Fluorophosphates of Rare Earth Elements Na2LnF2PO4. |url=http://dx.doi.org/10.1002/chin.199508015 |journal=ChemInform |volume=26 |issue=8 |doi=10.1002/chin.199508015 |issn=0931-7597}}</ref>

:{{chem2|PrPO4 + 2 NaF -> Na2PrF2(PO4)}}

== References ==
{{reflist}}

{{Praseodymium compounds}}
{{Phosphates}}

[[Category:Praseodymium(III) compounds]]
[[Category:Phosphates]]