Diiron silicide

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid =

| ImageFile =

| ImageSize =

| IUPACName = Diiron silicide

| OtherNames =

|Section1={{Chembox Identifiers

| CASNo =

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

| PubChem = 24945630

| InChI =1S/2Fe.Si

| InChIKey =JQEFXLZKSTUUEC-UHFFFAOYSA-N

| SMILES =[Si].[Fe].[Fe]

| ChemSpiderID =

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

}}

|Section2={{Chembox Properties

| Formula = Fe₂Si

| MolarMass = 139.78 g/mol

| Appearance =

| Density =

| MeltingPtC =

| MeltingPt_ref =

| BoilingPt =

| Solubility =

}}

|Section3={{Chembox Structure

| CrystalStruct = Trigonal (Ni₂Al-type){{cite journal|last1=Khalaff|first1=K.|last2=Schubert|first2=K.|title=Kristallstruktur von Fe₂Si(h)|journal=Journal of the Less Common Metals|volume=35|issue=2|year=1974|pages=341–345|doi=10.1016/0022-5088(74)90247-1}}

| SpaceGroup = P{{overline|3}}m1 (No. 161), hP6

| LattConst_a = 0.281 nm

| LattConst_b = 0.281 nm

| LattConst_c = 0.281 nm

| UnitCellFormulas = 1

}}

|Section7={{Chembox Hazards

| ExternalSDS =

| MainHazards =

| FlashPt = Non-flammable

}}

|Section8={{Chembox Related

| OtherAnions =

| OtherCations =Dicobalt silicide

}}

}}

Diiron silicide (Fe₂Si) is an intermetallic compound, a silicide of iron. It occurs in cosmic dust as the mineral hapkeite. It is a non-stoichiometric compound where the Fe:Si ratio depends on the sample preparation. A related compound Fe₅Si₃ occurs in nature as the mineral xifengite.