Praseodymium arsenide

Praseodymium arsenide is a binary inorganic compound of praseodymium and arsenic with the formula PrAs.

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

Preparation

Praseodymium arsenide can be prepared by heating praseodymium and arsenic:

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

Physical properties

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]

See also

• Praseodymium antimonide
• Praseodymium bismuthide