silver sulfide

Also known as Ag2S, silver(I) sulfide

inorganic compound

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 Å²
H-bond donors: 0
H-bond acceptors: 1
Formal charge: 0

via PubChem

Wikidata facts

Mass: 245.782265
Image: Sulfid stříbrný.PNG

Show 8 more facts

chemical formula: Ag₂S
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

Sources (3)

via Wikidata · CC0

~4 min read

Article

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