CdNO4
CdNO4 is a semiconducting oxide compound that is currently being studied for its electronic properties despite being thermodynamically unstable.
About CdNO4
CdNO4 is a complex inorganic compound categorized within the family of transparent conducting oxides. As a semiconducting material, it represents a unique intersection of cadmium, nitrogen, and oxygen chemistry, drawing interest for its potential role in optoelectronic applications.
Despite its classification, the compound is characterized by its position above the thermodynamic hull, suggesting it is likely unstable under standard conditions. Its structural behavior is documented across several databases, reflecting ongoing research into its synthesis and potential utility in specialized electronic devices.
Key Properties
Cross-validated computational properties for CdNO4, 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 CdNO4, 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. |
|---|---|---|---|---|---|
| P212121 (No. 19) | orthorhombic | 0.04 | 0.1516 | -5.666 | 3.80 |
| P21/c (No. 14) | monoclinic | 1.87 | 0.2943 | -5.720 | 3.52 |
| P212121 (No. 19) | Orthorhombic | — | — | — | 3.80 |
| P212121 (No. 19) | Orthorhombic | — | — | — | 3.90 |
| P212121 (No. 19) | — | — | — | — | — |
| P212121 (No. 19) | Orthorhombic | — | — | — | 3.85 |
Applications
Where CdNO4 is used.
Frequently Asked Questions
Common questions about CdNO4, answered from cross-validated data.
What is CdNO4?
CdNO4 is a semiconducting oxide compound that is currently being studied for its electronic properties despite being thermodynamically unstable.
What is CdNO4 used for?
What is the band gap of CdNO4?
Is CdNO4 a metal, semiconductor, or insulator?
Is CdNO4 thermodynamically stable?
What is the crystal structure of CdNO4?
What is the density of CdNO4?
How many polymorphs of CdNO4 are known?
What elements does CdNO4 contain?
Where does the data for CdNO4 come from?
How It Compares
Within the transparent conducting oxides class.
Unlike well-established, highly stable transparent conducting oxides such as ZnO or BaSnO3, CdNO4 exists in a metastable state that complicates its practical implementation. While materials like ZnGa2O4 and ZnCr2O4 are frequently utilized for their robust electronic properties, CdNO4 remains a subject of fundamental investigation due to its distinct chemical composition and thermodynamic challenges.
Related Compounds
Other Transparent Conducting Oxides in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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