Iron phosphide

Identifiers
CAS Number	26508-33-8 Y
3D model (JSmol)	Interactive image
PubChem CID	117803
CompTox Dashboard (EPA)	DTXSID5067215
InChI InChI=1S/3Fe.H3P/h;;;1H3
SMILES [Fe]12[Fe]3[Fe]1P23
Properties
Chemical formula	FeP
Molar mass	86.819 g·mol−1
Density	6.74 g/cm3
Melting point	1,100 °C (2,010 °F; 1,370 K)
Solubility in water	Insoluble in water
Solubility	soluble in nitric acid, HF, aqua regia insoluble in dilute acid, alkalis
Structure[1]
Crystal structure	MnP type (Orthorhombic)
Space group	Pnma (No. 62)
Lattice constant	a = 519.1 pm, b = 309.9 pm, c = 579.2 pm
Related compounds
Other cations	Chromium phosphide Manganese phosphide Cobalt phosphide Tungsten phosphide Ruthenium phosphide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Iron phosphide is a chemical compound of iron and phosphorus, with a formula of FeP.^[2] Its physical appearance is grey, hexagonal needles.

Manufacturing of iron phosphide takes place at elevated temperatures, where the elements combine directly. Iron phosphide reacts with moisture and acids producing phosphine (PH₃), a toxic and pyrophoric gas.

Iron phosphide can be used as a semiconductor. It has use in high power, high frequency applications, such as laser diodes.^[3]

Below a Néel temperature of about 119 K, FeP takes on an helimagnetic structure.^[4]

Hazards and mitigation

Iron phosphide is a hazardous substance.

Proper eye protection such as goggles should always be used when handling iron phosphide. It can be very harmful to the eyes, especially for individuals wearing contact lenses. Contact lenses have been known to react poorly with iron phosphide due to its corrosive properties,^{[citation needed]} but the scientific world does not all agree on the use of contact lenses in association with iron phosphide.^{[citation needed]}

In case of inhalation, the person should be moved to fresh air or given artificial respiration if not breathing. In case of ingestion, the person's mouth should be rinsed with water unless unconscious. In case of eye contact, immediate eye flushing is necessary.^[5]