Praseodymium arsenide
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| Praseodymium(III) arsenide
| Arsenic-Praseodymium
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| CASNo = 12044-28-9
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| ChemSpiderID = 74788
| EINECS = 234-953-0
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| InChI = InChI=1S/As.PrNJQBXEXIDZEJEW-UHFFFAOYSA-N
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| PubChem = 82880
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| SMILES = [As]#[Pr]
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| Density = 6.6 g/cm3
| Formula = PrAs
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| MolarMass = 215.83 g/mol
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| OtherAnions = PrN, PrP, PrSb, PrBi, Pr2O3
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Praseodymium arsenide is a binary inorganic compound of praseodymium and arsenic with the formula PrAs.
Preparation
Praseodymium arsenide can be prepared by heating praseodymium and arsenic:
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Physical properties
Praseodymium arsenide forms cubic crystals, space group F m3m, cell parameters a = 0.6009 nm, Z = 4, and structure like sodium chloride.{{cite book |author= |title=Справочник химика |editor=Никольский Б.П. и др. |edition=2-е изд., испр |location=М.-Л. |date=1966 |publisher=Химия}}{{Cite book |title=Diagrammy sostojanija dvojnych metalličeskich sistem: spravočnik v trech tomach. 1 |date=1996 |publisher=Mašinostroenie |isbn=978-5-217-02688-3 |location=Moskva}}{{Cite journal |last1=Gschneidner |first1=K. A. |last2=Calderwood |first2=F. W. |date=August 1986 |title=The As−Pr (Arsenic-Praseodymium) system |url=http://link.springer.com/10.1007/BF02873010 |journal=Bulletin of Alloy Phase Diagrams |language=en |volume=7 |issue=4 |pages=347–348 |doi=10.1007/BF02873010 |issn=0197-0216|url-access=subscription }}{{Cite journal |last1=Gschneidner |first1=K. A. |last2=Calderwood |first2=F. W. |date=June 1986 |title=The arsenic-rare earth systems |url=http://link.springer.com/10.1007/BF02869005 |journal=Bulletin of Alloy Phase Diagrams |language=en |volume=7 |issue=3 |pages=274–276 |doi=10.1007/BF02869005 |issn=0197-0216|url-access=subscription }} When heated, it decomposes into arsenic and Pr4As3.
At a pressure of 27 GPa, a phase transition to the tetragonal crystal system occurs.{{Cite journal |last1=Shirotani |first1=Ichimin |last2=Hayashi |first2=Junichi |last3=Yamanashi |first3=Keigo |last4=Hirano |first4=Kouji |last5=Adachi |first5=Takafumi |last6=Ishimatsu |first6=Naoki |last7=Shimomura |first7=Osamu |last8=Kikegawa |first8=Takumi |date=June 2003 |title=X-ray study with synchrotron radiation of cerium and praseodymium monopnictides with the NaCl-type structure at high pressures |url=https://linkinghub.elsevier.com/retrieve/pii/S0921452603000425 |journal=Physica B: Condensed Matter |language=en |volume=334 |issue=1–2 |pages=167–174 |doi=10.1016/S0921-4526(03)00042-5|bibcode=2003PhyB..334..167S |url-access=subscription }}