Potassium nitride

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| IUPACName = Potassium nitride

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| Section1 = {{Chembox Identifiers

| CASNo = 29285-24-3

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| SMILES = [K+].[K+].[K+].[N-3]

| StdInChI=1S/3K.N/q3*+1;-3

| StdInChIKey=TYTMEVSIRLGALE-UHFFFAOYSA-N

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| Section2 = {{Chembox Properties

| Formula = K₃N

| MolarMass = 131.3016 g/mol

| Appearance = Slightly yellow crystalline solid

| Density =

| MeltingPtC = -10

| MeltingPt_ref = {{cite journal |last1=Fischer |first1=D. |last2=Cancarevic |first2=Z. |last3=Schön |first3=J. C. |last4=Jansen |first4=M. |title=Zur Synthese und Struktur von K3N |journal=Zeitschrift für anorganische und allgemeine Chemie |date=January 2004 |volume=630 |issue=1 |pages=156–160 |doi=10.1002/zaac.200300280 |language=German}}

| MeltingPt_notes= (decomposes)

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| Section3 = {{Chembox Hazards

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| Section8 = {{Chembox Related

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| OtherCations =Lithium nitride
Sodium nitride

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Potassium nitride is an unstable chemical compound. Several syntheses were erroneously claimed in the 19th century, and by 1894 it was assumed that it did not exist.{{cite book|author=Chemical Society (Great Britain)|url=https://books.google.com/books?id=Deo2AAAAYAAJ&pg=PA512|title=Journal - Chemical Society, London|publisher=Chemical Society.|year=1894|pages=512–}}

However, a synthesis of this compound was claimed in 2004. It is observed to have the anti-Titanium(III) iodide structure below {{convert|233|K|C F}}, although a {{chem|Li|3|P}}-type structure should be more stable. Above this temperature, it converts to an orthorhombic phase. This compound was produced by the reaction of potassium metal and liquid nitrogen at {{convert|77|K|C F}} under vacuum:

:6K + N₂ → 2K₃N

This compound decomposes back into potassium and nitrogen at room temperature.

This compound is unstable due to steric hindrance.