OsC
OsC is a semiconducting transition metal carbide that exists in a metastable state.
About OsC
OsC is a binary compound composed of osmium and carbon. As a semiconducting material, it represents a specialized niche in carbide chemistry, drawing interest from researchers investigating the electronic behavior of transition metal-carbon systems.
Despite its existence in a high volume of reported structures, this compound is characterized by its thermodynamic instability, placing it above the hull. Its study provides valuable insights into the synthesis challenges and structural diversity inherent in transition metal carbides.
Key Properties
Cross-validated computational properties for OsC, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of OsC. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for OsC, 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. |
|---|---|---|---|---|---|
| F-43m (No. 216) | cubic | 0.19 | 0.6723 | 0.671 | — |
| — | — | 0.00 | 0.7116 | 0.712 | — |
| F-43m (No. 216) | cubic | 0.14 | 0.7170 | -30.749 | 13.69 |
| P213 (No. 198) | cubic | 0.19 | 0.7386 | 0.737 | — |
| — | — | 0.43 | 0.7718 | 0.772 | — |
| P213 (No. 198) | cubic | 0.30 | 0.7766 | -30.690 | 15.08 |
| P-6m2 (No. 187) | hexagonal | 0.00 | 0.9015 | 0.900 | — |
| P63/mmc (No. 194) | hexagonal | 0.00 | 0.9080 | 0.906 | — |
| — | — | 0.00 | 0.9114 | 0.911 | — |
| P-6m2 (No. 187) | hexagonal | 0.00 | 0.9161 | -30.550 | 16.34 |
| — | — | 0.00 | 0.9245 | 0.924 | — |
| P63/mmc (No. 194) | hexagonal | 0.00 | 0.9278 | -30.538 | 16.42 |
Frequently Asked Questions
Common questions about OsC, answered from cross-validated data.
What is OsC?
OsC is a semiconducting transition metal carbide that exists in a metastable state.
What is the band gap of OsC?
Is OsC a metal, semiconductor, or insulator?
Is OsC thermodynamically stable?
What is the crystal structure of OsC?
How many polymorphs of OsC are known?
What elements does OsC contain?
Where does the data for OsC come from?
How It Compares
As a unique binary carbide, OsC serves as a distinct entry in the study of transition metal compounds, where its semiconducting nature and metastable state highlight the complex bonding landscapes that define this class of materials.
Data sources & attribution
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
Analyze OsC in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 85 source databases.
Explore the Platform →