Cu4La4S8
Cu4La4S8 is a thermodynamically stable semiconducting compound containing copper, lanthanum, and sulfur.
About Cu4La4S8
Cu4La4S8 is a complex ternary sulfide composed of copper, lanthanum, and sulfur. As a thermodynamically stable phase located on the convex hull, it represents a robust structural arrangement that is well-supported by existing crystallographic data across multiple databases.
This material exhibits semiconducting electronic character, making it an intriguing candidate for research into optoelectronic or thermoelectric applications. Its stability suggests it can be reliably synthesized and integrated into experimental studies for advanced materials development.
Key Properties
Cross-validated computational properties for Cu4La4S8, aggregated across 4 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 Cu4La4S8, 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. |
|---|---|---|---|---|---|
| P21/c (No. 14) | monoclinic | 1.23 | 0.0000 | -15.851 | 5.35 |
| — | — | — | — | — | 3.53 |
| No. 0 | unknown | — | — | — | 1.33 |
| P-1 (No. 2) | — | — | — | — | — |
| P21/c (No. 14) | — | — | — | — | — |
Applications
Where Cu4La4S8 is used.
Frequently Asked Questions
Common questions about Cu4La4S8, answered from cross-validated data.
What is Cu4La4S8?
Cu4La4S8 is a thermodynamically stable semiconducting compound containing copper, lanthanum, and sulfur.
What is Cu4La4S8 used for?
What is the band gap of Cu4La4S8?
Is Cu4La4S8 a metal, semiconductor, or insulator?
Is Cu4La4S8 thermodynamically stable?
What is the crystal structure of Cu4La4S8?
What is the density of Cu4La4S8?
How many polymorphs of Cu4La4S8 are known?
What elements does Cu4La4S8 contain?
Where does the data for Cu4La4S8 come from?
How It Compares
As a distinct ternary sulfide, Cu4La4S8 serves as a foundational example of how copper and rare-earth elements can combine to form stable, semiconducting frameworks. While it stands as a unique entry in this chemical space, its position on the convex hull highlights its significance as a predictable and durable building block for future functional materials.
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).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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