Sodium phosphide

Sodium phosphide
Names
	Other names sodium phosphide, ; trisodiophosphine
Identifiers
CAS Number	12058-85-4 ;
3D model (JSmol)	Interactive image;
ChemSpider	55463 ;
ECHA InfoCard	100.031.834
EC Number	235-031-0;
PubChem CID	61547;
UNII	A360RQX9W2 ;
	InChI InChI=1S/3Na.P/q3+1;-3 Key: FHHBFSHDCCEUKM-UHFFFAOYSA-N ; InChI=1/3Na.P/q3+1;-3 Key: FHHBFSHDCCEUKM-UHFFFAOYAE;
	SMILES [Na+].[Na+].[Na+].[P-3];
Properties
Chemical formula	Na3P
Molar mass	99.943 g/mol
Appearance	red crystals
Density	1.74 g/cm3
Melting point	650 °C (1,202 °F; 923 K)
Solubility in water	hydrolysis
Solubility	insoluble in liquid CO2
Structure
Crystal structure	hexagonal; a = 4.9512 Å; c = 8.7874 Å
Coordination geometry	around P 5 near neighbours, trigonal bipyramid
Related compounds
Other anions	sodium arsenide; sodium nitride
Other cations	aluminium phosphide; lithium phosphide; potassium phosphide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Sodium phosphide is the inorganic compound with the formula Na₃P. It is a black solid. It is often described as Na⁺ salt of the P³⁻ anion. Na₃P is a source of the highly reactive phosphide anion. It should not be confused with sodium phosphate, Na₃PO₄.

In addition to Na₃P, five other binary compositions of sodium and phosphorus are known: NaP, Na₃P₇, Na₃P₁₁, NaP₇, and NaP₁₅.

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