Re8Si14
Re8Si14 is a stable, semimetallic rhenium silicide being studied for its potential role in advanced silicon-based anode materials.
About Re8Si14
Re8Si14 is a distinct rhenium silicide that exists as a thermodynamically stable phase on the convex hull. Its electronic structure is characterized as near-zero-gap, placing it in the semimetallic regime, which distinguishes it from many of the insulating or semiconducting silicides found in high-capacity energy storage research. This compound represents a complex structural arrangement within the silicon anode material class. Its stability and unique electronic properties make it a subject of interest for researchers investigating how transition metal silicides can modify the electrochemical performance and structural integrity of silicon-based anodes.
Key Properties
Cross-validated computational properties for Re8Si14, 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 Re8Si14, 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. |
|---|---|---|---|---|---|
| Cm (No. 8) | monoclinic | 0.05 | 0.0000 | -8.356 | 10.20 |
| Cm (No. 8) | monoclinic | 0.01 | 0.0907 | -8.265 | 10.17 |
| Cm (No. 8) | monoclinic | 0.00 | 0.2208 | -8.135 | 10.02 |
| Cm (No. 8) | — | — | — | — | — |
| Cm (No. 8) | — | — | — | — | — |
| Cm (No. 8) | — | — | — | — | — |
| — | — | — | — | — | 10.23 |
| — | — | — | — | — | 10.23 |
Applications
Where Re8Si14 is used.
Frequently Asked Questions
Common questions about Re8Si14, answered from cross-validated data.
What is Re8Si14?
Re8Si14 is a stable, semimetallic rhenium silicide being studied for its potential role in advanced silicon-based anode materials.
What is Re8Si14 used for?
What is the band gap of Re8Si14?
Is Re8Si14 a metal, semiconductor, or insulator?
Is Re8Si14 thermodynamically stable?
What is the crystal structure of Re8Si14?
What is the density of Re8Si14?
How many polymorphs of Re8Si14 are known?
What elements does Re8Si14 contain?
Where does the data for Re8Si14 come from?
How It Compares
Within the silicon anode materials class.
Unlike the more common and widely studied silicon-based anodes like Si or Mg2Si, Re8Si14 offers a more complex, metal-rich structural framework. While materials such as FeSi or MoSi2 are frequently examined for their mechanical robustness, Re8Si14 stands out due to its specific semimetallic character, providing a different electronic pathway compared to the traditional semiconducting silicides in this class.
Related Compounds
Other Silicon Anode Materials in the database.
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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