:Iron phosphide

{{short description|Chemical compound}}

{{Chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 428839572

| ImageFile =

| ImageSize =

| ImageAlt =

| IUPACName =

| PIN =

| OtherNames =

|Section1={{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|CAS}}

| CASNo = 26508-33-8

| ChemSpiderID = 140223

| EINECS = 247-751-2

| PubChem = 117803

| InChI = 1S/3Fe.H3P/h;;;1H3

| StdInChIKey = DPTATFGPDCLUTF-UHFFFAOYSA-N

| SMILES = [Fe]#P

}}

|Section2={{Chembox Properties

| Formula = |Fe=1|P=1

| MolarMass =

| Appearance =

| Density = 6.74 g/cm³

| MeltingPtC = 1100

| BoilingPt =

| Solubility = Insoluble in water

| SolubleOther = soluble in nitric acid, HF, aqua regia
insoluble in dilute acid, alkalis

}}

|Section3={{Chembox Hazards

| MainHazards =

| FlashPt =

| AutoignitionPt =

}}

| Section4 = {{Chembox Structure

| Structure_ref ={{cite journal | last1=Rundqvist | first1=Stig | last2=Sillén | first2=Lars Gunnar | last3=Timm | first3=D. | last4=Motzfeldt | first4=K. | last5=Theander | first5=Olof | last6=Flood | first6=H. | title=Phosphides of the B31 (MnP) Structure Type. | journal=Acta Chemica Scandinavica | publisher=Danish Chemical Society | volume=16 | year=1962 | issn=0904-213X | doi=10.3891/acta.chem.scand.16-0287 | pages=287–292| doi-access=free }}

| CrystalStruct = MnP type (Orthorhombic)

| SpaceGroup = Pnma (No. 62)

| PointGroup =

| LattConst_a = 519.1 pm

| LattConst_b = 309.9 pm

| LattConst_c = 579.2 pm

| LattConst_ref =

| LattConst_Comment =

| UnitCellVolume = 93.2 ų

| UnitCellFormulas =

| Coordination =

| MolShape =

| OrbitalHybridisation =

| Dipole =

}}

|Section8={{Chembox Related

| OtherAnions =

| OtherCations = Chromium phosphide
Manganese phosphide
Cobalt phosphide
Tungsten phosphide
Ruthenium phosphide

| OtherCompounds = Fe₂P; Fe₃P

}}

}}

Iron phosphide is a chemical compound of iron and phosphorus, with a formula of FeP.< Its physical appearance is grey 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 is a good electric and heat conductor.{{cite journal |last1=Vereshchagin |first1=Oleg S. |last2=Pankin |first2=Dmitrii V. |last3=Smirnov |first3=Mikhail B. |last4=Vlasenko |first4=Natalia S. |last5=Shilovskikh |first5=Vladimir V. |last6=Britvin |first6=Sergey N. |title=Raman spectroscopy: A promising tool for the characterization of transition metal phosphides |journal=Journal of Alloys and Compounds |date=February 2021 |volume=853 |pages=156468 |doi=10.1016/j.jallcom.2020.156468}}

Below a Néel temperature of about 119 K, FeP takes on an helimagnetic structure.{{cite journal | last1=Chernyavskii | first1=I. O. | last2=Nikitin | first2=S. E. | last3=Onykiienko | first3=Y. A. | last4=Inosov | first4=D. S. | last5=Stahl | first5=Q. | last6=Geck | first6=J. | last7=Hong | first7=X. C. | last8=Hess | first8=C. | last9=Gass | first9=S. | last10=Wolter | first10=A. U. B. | last11=Wolf | first11=D. | last12=Lubk | first12=A. | last13=Efremov | first13=D. V. | last14=Yokaichiya | first14=F. | last15=Aswartham | first15=S. | last16=Büchner | first16=B. | last17=Morozov | first17=I. V. |display-authors=5| title=Incommensurate magnet iron monophosphide FeP: Crystal growth and characterization | journal=Physical Review Materials | publisher=American Physical Society (APS) | volume=4 | issue=8 | date=2020-08-24 | issn=2475-9953 | doi=10.1103/physrevmaterials.4.083403 | page=083403|arxiv=2003.10968| bibcode=2020PhRvM...4h3403C | s2cid=214623160 }}