Na2Cr2O7
Sodium dichromate · Sodium bichromate
Sodium dichromate is a stable, semiconducting inorganic compound primarily utilized as a versatile oxidizing agent in industrial chemical production.
About Sodium dichromate
Sodium dichromate is a semiconducting layered sodium transition-metal oxide that occupies a stable position on the convex hull. Its structural characteristics make it a significant inorganic compound for various industrial chemical processes.
This material is widely recognized for its role as a powerful oxidizing agent. It serves as a fundamental building block in the production of chromium-based compounds, pigments, and corrosion-resistant coatings, leveraging its stable chemical nature.
Key Properties
Cross-validated computational properties for Sodium dichromate, 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 Na2Cr2O7, 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. |
|---|---|---|---|---|---|
| P-1 (No. 2) | triclinic | 2.53 | 0.0000 | -7.000 | 2.83 |
| P-1 (No. 2) | triclinic | 2.62 | 0.0053 | -6.995 | 2.87 |
| P-1 (No. 2) | — | — | — | — | — |
| P-1 (No. 2) | — | — | — | — | — |
| P-1 (No. 2) | Triclinic | — | — | — | 2.60 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.78 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.65 |
Applications
Where Sodium dichromate is used.
Frequently Asked Questions
Common questions about Sodium dichromate, answered from cross-validated data.
What is Na2Cr2O7?
Sodium dichromate is a stable, semiconducting inorganic compound primarily utilized as a versatile oxidizing agent in industrial chemical production.
What is Na2Cr2O7 used for?
What is the band gap of Na2Cr2O7?
Is Na2Cr2O7 a metal, semiconductor, or insulator?
Is Na2Cr2O7 thermodynamically stable?
What is the crystal structure of Na2Cr2O7?
What is the density of Na2Cr2O7?
How many polymorphs of Na2Cr2O7 are known?
What elements does Na2Cr2O7 contain?
Where does the data for Na2Cr2O7 come from?
How It Compares
Within the layered sodium transition-metal oxides class.
Within the diverse family of layered sodium transition-metal oxides, Na2Cr2O7 distinguishes itself from cathode-focused materials like NaCoO2 or NaNiO2 by its primary utility in industrial oxidation and surface treatment rather than energy storage applications.
Related Compounds
Other Layered Sodium Transition-Metal Oxides in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
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