Plutonium silicide

Plutonium silicide is a binary inorganic compound of plutonium and silicon with the chemical formula PuSi.^[2][3][4] The compound forms gray crystals.

Plutonium silicide

Names
Other names Plutonium monosilicide
Identifiers
CAS Number	12038-52-7 Y
3D model (JSmol)	Interactive image
ChemSpider	129549351
PubChem CID	159945682
InChI InChI=1S/Pu.Si Key: OBLLPTWSBXXIIY-UHFFFAOYSA-N
SMILES [Pu].[Si]
Properties
Chemical formula	PuSi
Molar mass	272.09 g/mol
Appearance	Grey crystals
Density	10.15
Melting point	1,576[1] °C (2,869 °F; 1,849 K)
Solubility in water	insoluble
Hazards
GHS labelling:
Signal word	Warning
Related compounds
Related compounds	Neptunium silicide
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 plutonium dioxide and silicon carbide:

${\displaystyle {\mathsf {PuO_{2}+SiC\ {\xrightarrow {T}}\ PuSi+CO_{2}\uparrow }}}$

Reaction of plutonium trifluoride with silicon:

${\displaystyle {\mathsf {4PuF_{3}+7Si\ {\xrightarrow {T}}\ 4PuSi+3SiF_{4}}}}$

Physical properties

Plutonium silicide forms gray crystals of orthorhombic crystal system, space group Pnma, cell parameters: a = 0.7933 nm, b = 0.3847 nm, c = 0.5727 nm, Z = 4, TiSi type structure.

At a temperature of 72 K, plutonium silicide undergoes a ferromagnetic transition.^[5]