HCNO
Fulminic acid · Hydrogen fulminate
Fulminic acid is a highly unstable chemical compound that is primarily known for its role in the synthesis of explosive materials. Due to its extreme sensitivity and tendency to decompose rapidly, it is rarely handled in its pure form and is typically generated as an intermediate in laboratory settings.
Key Properties
Cross-validated computational properties for Fulminic acid, aggregated across 4 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 HCNO, 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. |
|---|---|---|---|---|---|
| C2/c (No. 15) | monoclinic | 5.24 | 0.0000 | -7.806 | 1.82 |
| C2/c (No. 15) | monoclinic | 4.67 | 0.0000 | -7.406 | 1.45 |
| C2/c (No. 15) | monoclinic | 4.48 | 0.0085 | -7.397 | 1.78 |
| No. 0 | unknown | — | — | — | 0.45 |
| No. 0 | unknown | — | — | — | 0.28 |
| No. 0 | unknown | — | — | — | 0.47 |
| C2/c (No. 15) | Monoclinic | — | — | — | 1.51 |
| C2/c (No. 15) | Monoclinic | — | — | — | 1.45 |
| C2/c (No. 15) | Monoclinic | — | — | — | 1.61 |
| C2/c (No. 15) | monoclinic | — | — | — | 0.30 |
| No. 0 | unknown | — | — | — | 0.28 |
| No. 0 | unknown | — | — | — | 0.41 |
Applications
Where Fulminic acid is used.
Frequently Asked Questions
Common questions about Fulminic acid, answered from cross-validated data.
What is HCNO?
Fulminic acid is a highly unstable chemical compound that is primarily known for its role in the synthesis of explosive materials. Due to its extreme sensitivity and tendency to decompose rapidly, it is rarely handled in its pure form and is typically generated as an intermediate in laboratory settings.
What is HCNO used for?
What is the band gap of HCNO?
Is HCNO a metal, semiconductor, or insulator?
Is HCNO thermodynamically stable?
What is the crystal structure of HCNO?
What is the density of HCNO?
How many polymorphs of HCNO are known?
What elements does HCNO contain?
Where does the data for HCNO come from?
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).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
Analyze HCNO in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →