Ag2S

Acanthite · Argentite

Ag2S is a stable, semiconducting silver sulfide compound widely recognized for its importance in materials science and mineralogy.

AgS
Crystal structure of Ag2S
Ground-state structure · Materials Project
Overview

About Acanthite

Ag2S is a thermodynamically stable compound that exists as a semiconducting material. Its position on the convex hull highlights its robust nature, making it a significant subject of study with numerous documented structural variations across scientific databases. This material is valued for its unique electronic characteristics, which allow it to function effectively in various technological settings. Its stability and well-characterized structural behavior make it a foundational component for research into silver-based chalcogenides.

At a glance

Key Properties

Cross-validated computational properties for Acanthite, aggregated across 4 databases.

Band Gap

0.12–1.57 eV
Range across DFT structures

Energy Above Hull

0.000 eV/atom
Best (lowest) across sources

Stability

On hull (stable)
2 DFT sources

Structures

114
4 databases, 21 space groups
Validation

Cross-Source DFT Agreement

How well independent DFT databases agree on the thermodynamics of Ag2S. Tight agreement means computed properties can be trusted without re-running calculations.

Agreement Score

1.00 / 1.00
Trust tier: medium

Hull Spread

0.000 eV
EAH spread across sources

Sources Compared

2
jarvis, materials_project

Space Group Consensus

All match
Synthesis

Synthesis Routes

Literature-extracted synthesis procedures targeting Ag2S.

Solid State
Procedure available · ceder_solid_state
Solid State
Procedure available · ceder_solid_state
Uses

Applications

Where Acanthite is used.

Infrared optical materialsPhotoconductive sensorsSolar cell researchBiological labeling and imaging
Reference

Frequently Asked Questions

Common questions about Acanthite, answered from cross-validated data.

What is Ag2S?

Ag2S is a stable, semiconducting silver sulfide compound widely recognized for its importance in materials science and mineralogy.

More questions
What is Ag2S used for?
Acanthite (Ag2S) is used in infrared optical materials, photoconductive sensors, solar cell research, and biological labeling and imaging.
What is the band gap of Ag2S?
Acanthite (Ag2S) has a DFT-computed band gap of 0.12–1.57 eV across 114 reported structures.
Is Ag2S a metal, semiconductor, or insulator?
With a band gap up to 1.57 eV it is a semiconductor.
Is Ag2S thermodynamically stable?
Yes — Acanthite (Ag2S) sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
How many polymorphs of Ag2S are known?
114 structures of Ag2S are reported across 4 databases, spanning 21 distinct space groups.
How is Ag2S synthesized?
Literature-reported routes for Ag2S include solid state (2 procedures documented).
What elements does Ag2S contain?
Acanthite (Ag2S) contains Ag and S (2 elements).
Where does the data for Ag2S come from?
Ag2S data is cross-referenced from latticegraph.
Comparison

How It Compares

As a primary silver sulfide, Ag2S serves as a benchmark for the class of silver chalcogenides. It represents the most stable stoichiometry within this chemical system, providing a baseline for understanding the electronic and structural evolution of related silver-based semiconductors.

Data sources & attribution
  • latticegraph — Lattice Graph Materials Intelligence Platform

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