Germanium monosulfide or Germanium(II) sulfide is the chemical compound with the formula GeS. It is a chalcogenide glass and a semiconductor.[1] Germanium sulfide is described as a red-brown powder or black crystals.[2] Germanium(II) sulfide when dry is stable in air, hydrolyzes slowly in moist air but rapidly reacts in water forming Ge(OH)2 and then GeO.[3] It is one of a few sulfides that can be sublimed under vacuum without decomposition.[4]
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Systematic IUPAC name
Germanium(II) sulfide | |
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3D model (JSmol)
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ECHA InfoCard | 100.031.536 |
PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
GeS | |
Molar mass | 104.69 g·mol−1 |
Related compounds | |
Related compounds
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Carbon monosulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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First made by Winkler by reducing GeS2 with Ge.[3] Other methods include reduction in a stream of H2 gas,[3] or with an excess of H3PO2 followed by vacuum sublimation.[2]
It has a layer structure similar to that of black phosphorus.[2] The Ge-S distances range from 247 to 300 pm.[3] Molecular GeS in the gas phase has a Ge-S bond length of 201.21 pm.[5]