Ag4Er4Se8
Ag4Er4Se8 is a thermodynamically stable semiconducting quaternary compound composed of silver, erbium, and selenium.
About Ag4Er4Se8
Ag4Er4Se8 is a complex quaternary selenide that exhibits semiconducting electronic behavior. As a thermodynamically stable phase located on the convex hull, it represents a robust structural arrangement of silver, erbium, and selenium atoms.
This material is of significant interest to researchers investigating the interplay between rare-earth elements and chalcogenide frameworks. Its stability and electronic characteristics make it a compelling candidate for fundamental studies in solid-state chemistry and materials design.
Key Properties
Cross-validated computational properties for Ag4Er4Se8, 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 Ag4Er4Se8, 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. |
|---|---|---|---|---|---|
| P212121 (No. 19) | orthorhombic | 1.28 | 0.0000 | -5.033 | 7.38 |
| I41/amd (No. 141) | tetragonal | 0.41 | 0.0397 | -4.993 | 7.34 |
| P4/mmm (No. 123) | tetragonal | 0.00 | 0.1113 | -4.922 | 7.59 |
| P212121 (No. 19) | — | — | — | — | — |
| P212121 (No. 19) | — | — | — | — | — |
| P212121 (No. 19) | — | — | — | — | — |
| — | — | — | — | — | 6.03 |
Applications
Where Ag4Er4Se8 is used.
Frequently Asked Questions
Common questions about Ag4Er4Se8, answered from cross-validated data.
What is Ag4Er4Se8?
Ag4Er4Se8 is a thermodynamically stable semiconducting quaternary compound composed of silver, erbium, and selenium.
What is Ag4Er4Se8 used for?
What is the band gap of Ag4Er4Se8?
Is Ag4Er4Se8 a metal, semiconductor, or insulator?
Is Ag4Er4Se8 thermodynamically stable?
What is the crystal structure of Ag4Er4Se8?
What is the density of Ag4Er4Se8?
How many polymorphs of Ag4Er4Se8 are known?
What elements does Ag4Er4Se8 contain?
Where does the data for Ag4Er4Se8 come from?
How It Compares
As a unique quaternary selenide, Ag4Er4Se8 serves as a distinct representative of complex chalcogenide systems. Unlike simpler binary or ternary compounds, this material demonstrates how the integration of rare-earth erbium into a silver-selenide framework can yield a stable, well-defined electronic structure.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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