Structure via PubChem · Public domain (PubChem)
Chemical data
- Formula
- Ag2S
- Molecular weight
- 247.8 g/mol
- IUPAC name
- disilver;sulfide
- SMILES
- [S-2].[Ag+].[Ag+]
- InChIKey
- XUARKZBEFFVFRG-UHFFFAOYSA-N
- Polar surface area
- 1 Ų
- H-bond donors
- 0
- H-bond acceptors
- 1
- Formal charge
- 0
via PubChem
Wikidata facts
- Subclass of
- chemical compound
- Has part
- silver
- Mass
- 245.782265
- Image
- Sulfid stříbrný.PNG
Show 9 more facts
- chemical formula
- Ag₂S
- crystal system
- monoclinic crystal system
- canonical SMILES
- [S-2].[Ag+].[Ag+]
- Commons category
- Silver sulfide
- density
- 7.317
- Mohs' hardness
- 2.3
- melting point
- 832
- standard enthalpy of formation
- -33
- molar fusion enthalpy
- 14.06
via Wikidata · CC0
~4 min read
Encyclopedic overview
Silver sulfide is an inorganic compound with the formula Ag 2S. A dense black solid, it is the only sulfide of silver. It is useful as a photosensitizer in photography. It constitutes the tarnish that forms over time on silverware and other silver objects. Silver sulfide is insoluble in most solvents, but is degraded by strong acids. Silver sulfide is a network solid made up of silver (electronegativity of 1.98) and sulfur (electronegativity of 2.58) where the bonds have low ionic character (approximately 10%).
Formation
Excerpted from Wikipedia’s “silver sulfide” article, available under the CC BY-SA 4.0 licence.