H8C5
H8C5 is a metastable hydrocarbon material that functions as an electrical insulator.
About H8C5
H8C5 is a metastable hydrocarbon compound characterized by its insulating electronic behavior. As a wide-gap material, it represents a unique structural configuration within the carbon-hydrogen system, offering insights into the stability of complex molecular arrangements.
Its existence as a metastable phase makes it a subject of interest for fundamental studies in chemical bonding and phase transitions. Researchers investigate such compounds to understand the limits of structural stability in organic-based frameworks.
Key Properties
Cross-validated computational properties for H8C5, 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 H8C5, 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. |
|---|---|---|---|---|---|
| P-421c (No. 114) | tetragonal | 4.94 | 0.0564 | -6.092 | 1.03 |
| No. 0 | unknown | — | — | — | 0.61 |
| No. 0 | unknown | — | — | — | 0.20 |
| No. 0 | unknown | — | — | — | 0.27 |
| No. 0 | unknown | — | — | — | 0.26 |
| No. 0 | unknown | — | — | — | 0.26 |
| No. 0 | unknown | — | — | — | 0.26 |
| P-421c (No. 114) | — | — | — | — | — |
Applications
Where H8C5 is used.
Frequently Asked Questions
Common questions about H8C5, answered from cross-validated data.
What is H8C5?
H8C5 is a metastable hydrocarbon material that functions as an electrical insulator.
What is H8C5 used for?
What is the band gap of H8C5?
Is H8C5 a metal, semiconductor, or insulator?
Is H8C5 thermodynamically stable?
What is the crystal structure of H8C5?
What is the density of H8C5?
How many polymorphs of H8C5 are known?
What elements does H8C5 contain?
Where does the data for H8C5 come from?
How It Compares
As a standalone entry in this specific structural class, H8C5 serves as a primary reference point for studying the behavior of metastable hydrocarbons. It highlights the diversity of potential configurations available to simple carbon-hydrogen systems beyond the more common stable allotropes.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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