Cr3O8
This compound is a mixed-valence chromium oxide that features chromium in multiple oxidation states. It is primarily studied for its structural properties and potential roles in specialized chemical synthesis or as a precursor in materials science research.
Key Properties
Cross-validated computational properties for Cr3O8, 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 Cr3O8, 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. |
|---|---|---|---|---|---|
| P21/c (No. 14) | monoclinic | 0.59 | 0.0466 | -7.883 | 2.88 |
| C2/m (No. 12) | monoclinic | 0.00 | 0.0493 | -7.881 | 2.80 |
| Pnnm (No. 58) | orthorhombic | 0.33 | 0.0540 | -7.876 | 3.15 |
| C2/m (No. 12) | monoclinic | 0.00 | 0.1410 | -7.789 | 3.24 |
| C2/m (No. 12) | monoclinic | 0.00 | 0.3478 | -7.582 | 3.18 |
| P63mc (No. 186) | hexagonal | 0.00 | 0.3768 | -7.553 | 3.16 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.88 |
| P63mc (No. 186) | — | — | — | — | — |
| P63mc (No. 186) | — | — | — | — | — |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.80 |
| Pnnm (No. 58) | Orthorhombic | — | — | — | 3.15 |
| C2/m (No. 12) | Monoclinic | — | — | — | 3.55 |
Applications
Where Cr3O8 is used.
Frequently Asked Questions
Common questions about Cr3O8, answered from cross-validated data.
What is Cr3O8?
This compound is a mixed-valence chromium oxide that features chromium in multiple oxidation states. It is primarily studied for its structural properties and potential roles in specialized chemical synthesis or as a precursor in materials science research.
What is Cr3O8 used for?
What is the band gap of Cr3O8?
Is Cr3O8 a metal, semiconductor, or insulator?
Is Cr3O8 thermodynamically stable?
What is the crystal structure of Cr3O8?
What is the density of Cr3O8?
How many polymorphs of Cr3O8 are known?
What elements does Cr3O8 contain?
Where does the data for Cr3O8 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).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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