Cr2O5
Chromium pentoxide is a binary oxide of chromium that exists as a dark-colored solid. It is primarily studied in the context of inorganic chemistry research and as an intermediate in various oxidation-reduction reactions involving chromium species.
Key Properties
Cross-validated computational properties for Cr2O5, 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 Cr2O5, 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 | 0.52 | 0.0574 | -8.015 | 2.92 |
| Cmcm (No. 63) | orthorhombic | 0.75 | 0.1084 | -7.964 | 2.60 |
| Pmmn (No. 59) | orthorhombic | 0.52 | 0.1104 | -7.962 | 3.18 |
| Pbam (No. 55) | orthorhombic | 0.00 | 0.2814 | -7.791 | 3.24 |
| Pmmm (No. 47) | Orthorhombic | — | — | — | 3.27 |
| Pmmn (No. 59) | — | — | — | — | — |
| Pmmn (No. 59) | — | — | — | — | — |
| Cmcm (No. 63) | — | — | — | — | — |
| P1 (No. 1) | Triclinic | — | — | — | 3.53 |
| P1 (No. 1) | Triclinic | — | — | — | 4.87 |
| P1 (No. 1) | Triclinic | — | — | — | 4.32 |
| Cmcm (No. 63) | Orthorhombic | — | — | — | 2.60 |
Applications
Where Cr2O5 is used.
Frequently Asked Questions
Common questions about Cr2O5, answered from cross-validated data.
What is Cr2O5?
Chromium pentoxide is a binary oxide of chromium that exists as a dark-colored solid. It is primarily studied in the context of inorganic chemistry research and as an intermediate in various oxidation-reduction reactions involving chromium species.
What is Cr2O5 used for?
What is the band gap of Cr2O5?
Is Cr2O5 a metal, semiconductor, or insulator?
Is Cr2O5 thermodynamically stable?
What is the crystal structure of Cr2O5?
What is the density of Cr2O5?
How many polymorphs of Cr2O5 are known?
What elements does Cr2O5 contain?
Where does the data for Cr2O5 come from?
Related Compounds
Other Spinel Oxide Catalysts 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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