Praseodymium monoselenide

Praseodymium monoselenide is a compound with the chemical formula PrSe. It forms crystals.

Praseodymium monoselenide

Identifiers
CAS Number	12038-08-3 Y
3D model (JSmol)	Interactive image
ChemSpider	95747165
ECHA InfoCard	100.031.689
EC Number	234-872-0
CompTox Dashboard (EPA)	DTXSID5065198
InChI InChI=1S/Pr.Se Key: FAEQPLMETHVSSH-UHFFFAOYSA-N
SMILES [Pr].[Se]
Properties
Chemical formula	PrSe
Molar mass	219.87
Density	6.9 g/cm3
Melting point	2,100 °C (3,810 °F; 2,370 K)
Related compounds
Other anions	PrS PrTe
Other cations	CeSe NdSe
Related compounds	Pr2Se3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Preparation

Praseodymium monoselenide can be prepared by directly reacting praseodymium and selenium at 2100 °C:^[1]

Pr + Se → PrSe

The temperature at which selenium and praseodymium start to react when they come into contact is 620 K.^[2]

Properties

Praseodymium monoselenide forms cubic crystals, space group Fm3m, unit cell parameters a = 0.5741 nm, Z = 4, and a structure similar to that of sodium chloride.^[3][4]

The compound melts congruently^{[clarification needed]} at 2100 °C.^[4]