Ag28As4S24
Trechmannite · Ag28As4S24
Trechmannite is a rare sulfosalt mineral composed of silver, arsenic, and sulfur. It is primarily studied by mineralogists and geologists for its unique crystal structure and occurrence in specific geological environments.
Key Properties
Cross-validated computational properties for Trechmannite, aggregated across 3 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Reported Structures
Lowest-energy structures reported for Ag28As4S24, ranked by energy above hull.
| Space GroupSymmetry classification of the crystal arrangement. The number is the international space-group index. | Crystal SystemBroad lattice family, such as cubic, tetragonal, monoclinic, or triclinic, derived from unit-cell symmetry. | Band Gap (eV)Electronic gap calculated for this specific reported structure, measured in electronvolts. | E above hull (eV/atom)Thermodynamic distance from the convex hull for this structure, normalized per atom. Lower is generally more stable. | E/atom (eV)Computed total energy normalized per atom. Use energy above hull, not this value alone, when comparing stability. | Density (g/cm³)Mass per relaxed crystal volume, reported in grams per cubic centimeter. |
|---|---|---|---|---|---|
| P213 (No. 198) | cubic | 0.73 | 0.0055 | -15.297 | 5.63 |
| — | — | — | — | — | 5.68 |
| P213 (No. 198) | — | — | — | — | — |
| P213 (No. 198) | — | — | — | — | — |
Applications
Where Trechmannite is used.
Frequently Asked Questions
Common questions about Trechmannite, answered from cross-validated data.
What is Ag28As4S24?
Trechmannite is a rare sulfosalt mineral composed of silver, arsenic, and sulfur. It is primarily studied by mineralogists and geologists for its unique crystal structure and occurrence in specific geological environments.
What is Ag28As4S24 used for?
What is the band gap of Ag28As4S24?
Is Ag28As4S24 a metal, semiconductor, or insulator?
Is Ag28As4S24 thermodynamically stable?
What is the crystal structure of Ag28As4S24?
What is the density of Ag28As4S24?
How many polymorphs of Ag28As4S24 are known?
What elements does Ag28As4S24 contain?
Where does the data for Ag28As4S24 come from?
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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