K2O8Re2
K2O8Re2 is a stable, wide-band-gap insulating compound composed of potassium, rhenium, and oxygen.
About K2O8Re2
K2O8Re2 is a complex inorganic compound characterized by its insulating electronic nature and wide-band-gap behavior. As a thermodynamically stable phase residing on the convex hull, it represents a robust structural arrangement of potassium, rhenium, and oxygen atoms.
Its stability and electronic profile make it an intriguing subject for fundamental materials research. With multiple reported structures across various databases, it serves as a significant reference point for understanding rhenium-based oxides in solid-state chemistry.
Key Properties
Cross-validated computational properties for K2O8Re2, 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 K2O8Re2, 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. |
|---|---|---|---|---|---|
| I41/a (No. 88) | tetragonal | 3.69 | 0.0000 | -7.911 | 4.75 |
| — | — | — | — | — | 4.70 |
| I41/a (No. 88) | — | — | — | — | — |
| I41/a (No. 88) | — | — | — | — | — |
| I41/a (No. 88) | — | — | — | — | — |
| I41/a (No. 88) | — | — | — | — | — |
| I41/a (No. 88) | — | — | — | — | — |
| I41/a (No. 88) | — | — | — | — | — |
Applications
Where K2O8Re2 is used.
Frequently Asked Questions
Common questions about K2O8Re2, answered from cross-validated data.
What is K2O8Re2?
K2O8Re2 is a stable, wide-band-gap insulating compound composed of potassium, rhenium, and oxygen.
What is K2O8Re2 used for?
What is the band gap of K2O8Re2?
Is K2O8Re2 a metal, semiconductor, or insulator?
Is K2O8Re2 thermodynamically stable?
What is the crystal structure of K2O8Re2?
What is the density of K2O8Re2?
How many polymorphs of K2O8Re2 are known?
What elements does K2O8Re2 contain?
Where does the data for K2O8Re2 come from?
How It Compares
As a distinct rhenium-based oxide, K2O8Re2 occupies a unique position within the landscape of inorganic compounds. It serves as a foundational example of stable, wide-gap insulating materials, providing critical data for researchers investigating the structural diversity of complex transition metal oxides.
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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