Plutonium selenide

Plutonium selenide is a binary inorganic compound of plutonium and selenium with the chemical formula PuSe.^[1][2] The compound forms black crystals and does not dissolve in water.

Plutonium selenide

Names
Other names Plutonium monoselenide, Plutonium(II) selenide
Identifiers
CAS Number	23299-88-9 Y
3D model (JSmol)	Interactive image
InChI InChI=1S/Pu.Se Key: IJHCCJHFYQUWOM-UHFFFAOYSA-N
SMILES [Pu].[Se]
Properties
Chemical formula	PuSe
Molar mass	323.024
Appearance	Black crystals
Melting point	2,075 °C (3,767 °F; 2,348 K)
Solubility in water	insoluble
Hazards
GHS labelling:
Signal word	Warning
Related compounds
Other anions	Plutonium sulfide Plutonium telluride
Other cations	Magnesium selenide Strontium selenide Barium selenide Iron(II) selenide Iron(III) selenide Lead(II) selenide Praseodymium selenide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Reaction of diplutonium triselenide and plutonium trihydride:

${\displaystyle {\ce {2{Pu2Se3}+2{PuH3}->[{\text{1600 °C}}]4{PuSe}+3{H2}}}}$

Fusion of stoichiometric amounts of pure substances:

${\displaystyle {\ce {{Pu}+{Se}->[{\text{220–1000 °C}}]PuSe}}}$

Properties

Plutonium selenide forms black crystals of a cubic system, space group Fm3m, cell parameters a = 0.57934 nm, Z = 4, structure of the NaCl type.^[3][4]

With increasing pressure, two phase transitions occur: at 20 GPa into the trigonal system and at 35 GPa into the cubic system, a structure of the CsCl type.

Its magnetic susceptibility follows the Curie-Weiss law.^[5]