:Germanium monosulfide

{{Chembox

| Name =

| ImageFile = GeS.png

| OtherNames =

| IUPACName =

| SystematicName = Germanium(II) sulfide

| Section1 = {{Chembox Identifiers

| CASNo = 12025-32-0

| ChemSpiderID = 4897590

| PubChem = 6367215

| StdInChI=1S/GeS/c1-2

| StdInChIKey = VDNSGQQAZRMTCI-UHFFFAOYSA-N

| SMILES = S=[Ge]

}}

| Section2 = {{Chembox Properties

|Ge=1|S=1

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| Section6 =

| Section8 = {{Chembox Related

| OtherCompounds = Carbon monosulfide

Germanium monoxide

Germanium disulfide

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Germanium monosulfide or Germanium(II) sulfide is the chemical compound with the formula GeS. Germanium sulfide is a red-brown powder or black crystals.{{Greenwood&Earnshaw2nd}} It hydrolyzes slowly in moist air but rapidly reacts in water forming Ge(OH)₂ and then GeO.E. G. Rochow, E. W. Abel ,1973, The Chemistry of Germanium Tin and Lead, Pergamon Press, {{ISBN|0-08-018854-0}} It is one of a few sulfides that can be sublimed under vacuum without decomposition.Michael Binnewies, Robert Glaum, Marcus Schmidt, Peer Schmidt, 2012, Chemical Vapor Transport Reactions, De Gruyter, {{ISBN|978-3-11-025464-8}} It also forms chalcogenide glasses and is a semiconductor.{{Cite journal|last1=Sutter|first1=Eli|last2=Zhang|first2=Bo|last3=Sun|first3=Muhua|last4=Sutter|first4=Peter|date=2019-08-27|title=Few-Layer to Multilayer Germanium(II) Sulfide: Synthesis, Structure, Stability, and Optoelectronics|journal=ACS Nano|volume=13|issue=8|pages=9352–9362|doi=10.1021/acsnano.9b03986|pmid=31305983|osti=1573814 |issn=1936-0851|url=https://www.osti.gov/biblio/1573814}}