Eu8I20K4
Eu8I20K4 is a semiconducting ternary halide compound composed of europium, potassium, and iodine that is considered a viable target for experimental synthesis.
About Eu8I20K4
Eu8I20K4 is a complex halide compound featuring europium, potassium, and iodine. As a semiconducting material, it occupies a unique niche in solid-state chemistry, offering distinct electronic properties that arise from the interplay of its constituent elements.
Its thermodynamic profile indicates it is near the stability hull, suggesting that it is a synthesizable phase of interest for researchers exploring novel inorganic frameworks. The existence of multiple structural reports across databases highlights its significance in the study of rare-earth halide systems.
Key Properties
Cross-validated computational properties for Eu8I20K4, 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 Eu8I20K4, 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 | 1.25 | 0.0090 | -5.481 | 5.07 |
| P21/c (No. 14) | — | — | — | — | — |
| — | — | — | — | — | 5.00 |
Applications
Where Eu8I20K4 is used.
Frequently Asked Questions
Common questions about Eu8I20K4, answered from cross-validated data.
What is Eu8I20K4?
Eu8I20K4 is a semiconducting ternary halide compound composed of europium, potassium, and iodine that is considered a viable target for experimental synthesis.
What is Eu8I20K4 used for?
What is the band gap of Eu8I20K4?
Is Eu8I20K4 a metal, semiconductor, or insulator?
Is Eu8I20K4 thermodynamically stable?
What is the crystal structure of Eu8I20K4?
What is the density of Eu8I20K4?
How many polymorphs of Eu8I20K4 are known?
What elements does Eu8I20K4 contain?
Where does the data for Eu8I20K4 come from?
How It Compares
As a specialized europium-potassium iodide, this compound serves as a distinct example of complex halide chemistry. It represents a specific structural arrangement that expands the known diversity of ternary iodide systems, providing a platform for investigating how rare-earth ions influence the electronic behavior of halide-based lattices.
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).
Analyze Eu8I20K4 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →