Zinc arsenide

Short description: Chemical compound of zinc and arsenic

Zinc arsenide  Names

Other names

trizinc diarsenide

Identifiers

CAS Number

* 12006-40-5

3D model (JSmol)

* Interactive image

ChemSpider |

* 21242020 Y

EC Number |

* 234-486-2

PubChem CID

* 25147458

InChI

* InChI=1S/2As.3Zn

Key: RHKSESDHCKYTHI-UHFFFAOYSA-N

SMILES

* [Zn].[Zn]=[As].[Zn]=[As]

Properties

Chemical formula

| Zn3As2
Molar mass | 345.984 g/mol
Appearance  | Silver grey[1]
Density | 5.53 g/cm3[1]
Melting point |  1,015 °C (1,859 °F; 1,288 K)

Solubility in water

| Insoluble[1]
Structure

Crystal structure

| Tetragonal
Hazards
Safety data sheet | [1]
GHS pictograms |
GHS Signal word | Danger

GHS hazard statements

| H301, H331, H350, H410

GHS precautionary statements

| P201, P202, P222, P231+232, P261, P264, P270, P271, P273, P280, P281, P301+310+330Script error: No such module "Preview warning".Category:GHS errors, P304+340, P308+313, P321, P370+378, P391, P403+233, P405, P422, P501
NFPA 704 (fire diamond)  |

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

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.[2]

## Contents

* 1 Synthesis and reactions
* 2 Structure
* 3 Electronic structure
* 4 References

## 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.[3] 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.[4]

## Electronic structure

Its lowest direct and indirect bandgaps are within 30 meV or each other.[2]

## References

1. ↑ 1.0 1.1 1.2 1.3 "LTS Research Laboratories, Inc. Safety Data Sheet: Zinc Arsenide". https://www.ltschem.com/msds/Zn3As2.pdf.
2. ↑ 2.0 2.1 Botha, J. R.; Scriven, G. J.; Engelbrecht, J. A. A.; Leitch, A. W. R. (1999). "Photoluminescence properties of metalorganic vapor phase epitaxial Zn3As2". Journal of Applied Physics 86 (10): 5614–5618. doi:10.1063/1.371569. Bibcode: 1999JAP....86.5614B.
3. ↑ Okamoto, H. (1992). "The As-Zn (arsenic-zinc) system". Journal of Phase Equilibria 13 (2): 155–161. doi:10.1007/BF02667479.
4. ↑ Trukhan, V. M.; Izotov, A. D.; Shoukavaya, T. V. (2014). "Compounds and solid solutions of the Zn-Cd-P-As system in semiconductor electronics". Inorganic Materials 50 (9): 868–873. doi:10.1134/S0020168514090143.

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Zinc compounds

Zinc(I)|

| Organozinc(I) compounds|

* Zn2(C5(CH3)5)2

|

Zinc(II)|

* Zn(N3)2
* ZnBr2
* Zn(CN)2
* ZnCl2
* Zn(ClO3)2
* ZnCrO4
* ZnF2
* ZnH2
* ZnI2
* ZnMoO4
* Zn(NO3)2
* ZnO
* ZnO2
* Zn(OH)2
* ZnS
* ZnSO4
* ZnSe
* ZnTe
* Zn2P2O7
* Zn3Sb2
* Zn3As2
* Zn3N2
* Zn3P2
* Zn3(PO4)2

| Organozinc(II) compounds|

* Zn(CH3)2
* Zn(C2H5)2
* Zn(CH(CH3)2)2
* Zn(C(CH3)3)2
* Zn(C6H5)2
* ZnCIH2I

|

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Arsenic compounds

* AsBr3
* AsCl3
* AsCl5
* AsF3
* AsF5
* AsH3
* AsHgI4
* AsI3
* As2O3
* As2O5
* As2S3
* As2S5
* As2Se3
* As4S4

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*[CID]: Compound ID
*[H301]: Toxic if swallowed
*[H331]: Toxic if inhaled
*[H350]: May cause cancer
*[H410]: Very toxic to aquatic life with long lasting effects
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