Silver sulfide (Ag 2S) is the sulfide of silver. It is useful as a photosensitizer in photography.
Properties
This dense black solid constitutes the tarnish that forms over time on silverware and other silver objects. Silver sulfide is insoluble in all solvents, but is degraded by strong acids. Silver sulfide features a covalent bond, as it is made up of silver (electronegativity of 1.98) and sulfur (electronegativity of 2.58). It is a component of classical qualitative inorganic analysis. When formed on electrical contacts operating in an atmosphere rich in hydrogen sulfide, long filaments known as silver whiskers can form.
Degrading wooden treasure chests aboard sunken galleons can provide the sulfide needed for certain sulfide ion consuming bacteria to produce hydrogen sulfide gas. When combined with silver the hydrogen sulfide gas creates a layer of black silver sulfide patina on the silver, protecting the inner silver from further conversion to silver sulfide.
Structure
Three forms are known: monoclinic acanthite (β-form), stable below 179°C, body centered cubic so-called argentite (α-form), stable above 180°C, and a high temperature face-centred cubic (γ-form) stable above 586°C. The higher temperature forms are electrical conductors. It is found in nature as relatively low temperature mineral acanthite. Acanthite is an important ore of silver. In the acanthite, monoclinic, form there are two crystallographically distinct silver atoms with two and three near neighbour sulfur atoms respectively. The name argentite refers to a cubic form, which, due to instability in "normal" temperatures, is found in form of the pseudomorphosis of acanthite after argentite.
HALIFAX, NS / ACCESSWIRE / December 6, 2024 / SilverTigerMetalsInc ... Silver Grade1 ... Silver Recovery (Oxide/Sul.)2 ... The presence of transition and sulfide zones has affected both the gold and silver recoveries and are shown as separate recoveries.
... gr/tn of silver ... Due to oxidation (transitioning zone from oxides to sulfides), the average recovery to concentrate was 53.05% for gold and 75.50% for silver, in line with management expectations.
As concerns grow over global economic stability, including inflation, geopolitical tensions, and market volatility, many investors are turning to precious metals like gold and silver as a safe haven.
Silver bismuth sulfide (AgBiS2) nanocrystals (NCs) are an earth-abundant material that has been used in recent years as a promising PV material, often in combination with cadmium sulfide in the development of several kinds of ultra-thin solar cells.
... silver values associated with disseminated grey and black breccia-hosted sulfide material consisting of sphalerite, galena, chalcocite, bornite, covellite and undetermined lead and silver sulphosalts.
... silver values associated with disseminated grey and black breccia-hosted sulfide material consisting of sphalerite, galena, chalcocite, bornite, covellite and undetermined lead and silver sulphosalts.
The fossils are also fascinating for their preservation in fool’s gold (also known as the mineral pyrite) that forms through a reaction between sulfide and iron.
“Imagine a bumpy road that slows down cars ... Colloidal silver bismuth sulfide (AgBiS2) nanocrystal is a material that is characterized by an extremely high absorption coefficient, making them ideal for ultra-thin-film solar cell absorbers ... (EES) ... .
HALIFAX, NS / ACCESSWIRE / October 22, 2024 / SilverTigerMetalsInc ... The presence of transition and sulfide zones has affected both the gold and silver recoveries and are shown as separate recoveries ...Access the Silver Tiger Metals Inc.
($1950/oz gold price, $25.24/oz silver price, economic-constrained estimate)2 ... The Los Reyes Resource is hosted within low-sulfidation epithermal ‘horsetail’ structures containing significant gold and silver.
Semi-massive to massive sulfides in outcrop (4.36% zinc in outcrop grab sample) ... Four samples (outcrop and subcrop) from one site in the northern region of the property contain semi-massive to massive sulfide mineralization.
reported that it has intersected visible sulfide mineralization on holeNo.2, No.3 and No.4 at the BostonMine, the company’s high-grade gold, silver and copper project in Elko County in Nevada.
... potential viability of producing silver from the Oxides via agitated leach processing, as a precursor to the production of silver, lead and zinc in the Sulfide Plan outlined in the 2019 Corani Report.
