zinc arsenide

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| Name = Zinc arsenide

| Reference =

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| OtherNames = trizinc diarsenide

|Section1={{Chembox Identifiers

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

| ChemSpiderID = 21242020

| UNII_Ref =

| UNII =

| PubChem = 25147458

| EC_number = 234-486-2

| InChI = 1S/2As.3Zn

| InChIKey = RHKSESDHCKYTHI-UHFFFAOYSA-N

| SMILES = [Zn].[Zn]=[As].[Zn]=[As]

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| CASNo_Ref =

| CASNo = 12006-40-5

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|Section2={{Chembox Properties

| Formula = Zn₃As₂

| MolarMass = 345.984 g/mol

| Appearance = Silver grey

| Density = 5.53 g/cm³

| Solubility = Insoluble

| SolubleOther =

| MeltingPtC = 1015

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|Section3={{Chembox Structure

| CrystalStruct = Tetragonal

| SpaceGroup =

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|Section7={{Chembox Hazards

| GHSPictograms = {{GHS05}}{{GHS06}}{{GHS08}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|301|331|350|410}}

| PPhrases = {{P-phrases|201|202|222|231+232|261|264|270|271|273|280|281|301+310+330|304+340|308+313|321|370+378|391|403+233|405|422|501}}

| NFPA-H = 4

| NFPA-R = 0

| NFPA-F = 0

| NFPA-S =

| ExternalSDS = {{Cite web|url=https://www.ltschem.com/msds/Zn3As2.pdf|title=LTS Research Laboratories, Inc. Safety Data Sheet: Zinc Arsenide|access-date=2020-10-26|website=ltschem.com}}

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Zinc arsenide (Zn₃As₂) is a binary compound of zinc with arsenic which forms gray tetragonal crystals. It is an inorganic semiconductor with a band gap of 1.0 eV.{{Cite journal|title=Photoluminescence properties of metalorganic vapor phase epitaxial Zn3As2|journal=Journal of Applied Physics|last1=Botha|first1=J. R.|volume=86|pages=5614–5618|last2=Scriven|first2=G. J.|issue=10|doi=10.1063/1.371569|year=1999|last3=Engelbrecht|first3=J. A. A.|last4=Leitch|first4=A. W. R.|bibcode=1999JAP....86.5614B }}

Synthesis and reactions

Zinc arsenide can be prepared by the reaction of zinc with arsenic

:3 Zn + 2 As → Zn₃As₂

Structure

Zn₃As₂ has a room-temperature tetragonal form that converts to a different tetragonal phase at 190 °C and to a third phase at 651 °C.{{Cite journal|title=The As-Zn (arsenic-zinc) system|journal=Journal of Phase Equilibria|last=Okamoto|first=H.|volume=13|pages=155–161|issue=2|year=1992|doi=10.1007/BF02667479 |s2cid=98798806 }} In the room-temperature form, the zinc atoms are tetrahedrally coordinated and the arsenic atoms are surrounded by six zinc atoms at the vertices of a distorted cube. The crystalline structure of zinc arsenide is very similar to that of cadmium arsenide (Cd₃As₂), zinc phosphide (Zn₃P₂) and cadmium phosphide (Cd₃P₂). These compounds of the Zn-Cd-P-As quaternary system exhibit full continuous solid-solution.{{Cite journal|title=Compounds and solid solutions of the Zn-Cd-P-As system in semiconductor electronics|journal=Inorganic Materials|last1=Trukhan|first1=V. M.|volume=50|pages=868–873|last2=Izotov|first2=A. D.|issue=9|doi=10.1134/S0020168514090143|year=2014|last3=Shoukavaya|first3=T. V.|s2cid=94409384 }}

Electronic structure

Its lowest direct and indirect bandgaps are within 30 meV of each other.

References

arsenide

zinc

Category:II-V semiconductors

Category:II-V compounds

Category:Soviet chemical weapons program