Cu2Ge2S14Tb6
Cu2Ge2S14Tb6 is a stable, semiconducting quaternary sulfide compound composed of copper, germanium, sulfur, and terbium.
About Cu2Ge2S14Tb6
Cu2Ge2S14Tb6 is a complex quaternary sulfide compound characterized by its semiconducting electronic nature. As a thermodynamically stable phase residing on the convex hull, it represents a robust structural arrangement of copper, germanium, sulfur, and terbium atoms. Its unique composition makes it a subject of interest for researchers investigating multi-element chalcogenide systems.
The material is notable for its structural diversity, supported by multiple reported entries across major materials databases. This stability and complexity suggest potential utility in specialized optoelectronic or semiconductor applications where precise control over electronic properties is required.
Key Properties
Cross-validated computational properties for Cu2Ge2S14Tb6, 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 Cu2Ge2S14Tb6, 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. |
|---|---|---|---|---|---|
| P63 (No. 173) | hexagonal | 1.81 | 0.0000 | -6.032 | 5.60 |
| P63 (No. 173) | — | — | — | — | — |
| — | — | — | — | — | 5.60 |
| P63 (No. 173) | — | — | — | — | — |
Applications
Where Cu2Ge2S14Tb6 is used.
Frequently Asked Questions
Common questions about Cu2Ge2S14Tb6, answered from cross-validated data.
What is Cu2Ge2S14Tb6?
Cu2Ge2S14Tb6 is a stable, semiconducting quaternary sulfide compound composed of copper, germanium, sulfur, and terbium.
What is Cu2Ge2S14Tb6 used for?
What is the band gap of Cu2Ge2S14Tb6?
Is Cu2Ge2S14Tb6 a metal, semiconductor, or insulator?
Is Cu2Ge2S14Tb6 thermodynamically stable?
What is the crystal structure of Cu2Ge2S14Tb6?
What is the density of Cu2Ge2S14Tb6?
How many polymorphs of Cu2Ge2S14Tb6 are known?
What elements does Cu2Ge2S14Tb6 contain?
Where does the data for Cu2Ge2S14Tb6 come from?
How It Compares
As a quaternary sulfide, Cu2Ge2S14Tb6 occupies a unique niche in materials science, representing a stable, complex framework that distinguishes itself from simpler binary or ternary chalcogenides. It serves as a prime example of how incorporating rare-earth elements like terbium into a copper-germanium-sulfur matrix can yield a thermodynamically favored, semiconducting crystalline 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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