Strontium phosphide

Strontium phosphide
Names
	Other names Tristrontium diphosphide
Identifiers
CAS Number	12504-16-4;
3D model (JSmol)	Interactive image;
ChemSpider	145854;
EC Number	235-678-9;
PubChem CID	166710;
UN number	2013
	InChI InChI=1S/2P.3Sr/q2-3;3+2 Key: ATAJSUOOOWSVGL-UHFFFAOYSA-N;
	SMILES [P-3].[P-3].[Sr+2].[Sr+2].[Sr+2];
Properties
Chemical formula	P2Sr3
Molar mass	324.8
Appearance	Black crystalline material
Density	2.68 g/cm3
Solubility in water	Decomposes in water
Structure
Crystal structure	cubic
Related compounds
Other anions	Calcium phosphide; Barium phosphide
Other cations	Strontium nitride; Strontium arsenide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

Strontium phosphide is an inorganic compound of strontium and phosphorus with the chemical formula Sr₃P₂.^[1]^[2] The compound looks like black crystalline material.^{[citation needed]}

Synthesis

Heating strontium phosphate with soot in an arc furnace:

[math]\ce{ Sr3(PO4)2 + 8C -> Sr3P2 + 8CO }[/math]

Reaction of strontium with red phosphorus at high temperature:^{[citation needed]}

[math]\ce{ 6Sr + P4 -> 2Sr3P2 }[/math]

Strontium phosphide forms black crystals.^{[citation needed]}

Thermally stable, melts at high temperatures.

Dangerous when wet, poison.^[3]

Decomposes with water releasing phosphine:^{[citation needed]}

[math]\ce{ Sr3P2 + 2H2O -> 3Sr(OH)2 + 2PH3 }[/math]

Reacts with acids:

[math]\ce{ Sr3P2 + 6HCl -> 3SrCl2 + 2PH3 }[/math]

It is a highly reactive substance used as a reagent and in the manufacture of chemically reactive devices.^[4]

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