Praseodymium arsenide

Praseodymium arsenide
Names
	Other names Praseodymium(III) arsenide; Arsenic-Praseodymium;
Identifiers
CAS Number	12044-28-9;
3D model (JSmol)	Interactive image;
ChemSpider	74788;
ECHA InfoCard	100.031.763
EC Number	234-953-0;
PubChem CID	82880;
CompTox Dashboard (EPA)	DTXSID501308715 ;
	InChI InChI=1S/As.PrNJQBXEXIDZEJEW-UHFFFAOYSA-N;
	SMILES [As]#[Pr];
Properties
Chemical formula	PrAs
Molar mass	215.83 g/mol
Density	6.6 g/cm3
Related compounds
Other anions	PrN, PrP, PrSb, PrBi, Pr2O3
Other cations	CeAs, NdAs
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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:

{\mathsf {Pr+As\ {\xrightarrow {T}}\ PrAs}}

Praseodymium arsenide forms cubic crystals, space group F m3m, cell parameters a = 0.6009 nm, Z = 4, and structure like sodium chloride.^[1]^[2]^[3]^[4] When heated, it decomposes into arsenic and Pr₄As₃.^[2] At a pressure of 27 GPa, a phase transition to the tetragonal crystal system occurs.^[5]

^ Справочник химика. Vol. 1 (2-е изд., испр ed.). М.-Л.: Химия. 1966. {{cite book}}: Unknown parameter |agency= ignored (help)
^ ^a ^b Diagrammy sostojanija dvojnych metalličeskich sistem: spravočnik v trech tomach. 1. Moskva: Mašinostroenie. 1996. ISBN 978-5-217-02688-3.
^ Gschneidner, K. A.; Calderwood, F. W. (August 1986). "The As−Pr (Arsenic-Praseodymium) system". Bulletin of Alloy Phase Diagrams. 7 (4): 347–348. doi:10.1007/BF02873010. ISSN 0197-0216.
^ Gschneidner, K. A.; Calderwood, F. W. (June 1986). "The arsenic-rare earth systems". Bulletin of Alloy Phase Diagrams. 7 (3): 274–276. doi:10.1007/BF02869005. ISSN 0197-0216.
^ Shirotani, Ichimin; Hayashi, Junichi; Yamanashi, Keigo; Hirano, Kouji; Adachi, Takafumi; Ishimatsu, Naoki; Shimomura, Osamu; Kikegawa, Takumi (June 2003). "X-ray study with synchrotron radiation of cerium and praseodymium monopnictides with the NaCl-type structure at high pressures". Physica B: Condensed Matter. 334 (1–2): 167–174. Bibcode:2003PhyB..334..167S. doi:10.1016/S0921-4526(03)00042-5.