Sr2CrO4
Strontium chromate is an inorganic compound that typically appears as a yellow crystalline solid. It is primarily utilized as a corrosion inhibitor in protective coatings and as a pigment in various industrial applications.
Overview
Key Properties
Cross-validated computational properties for Sr2CrO4, 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.
2.00 eV
Range across DFT structures
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.
0.000 eV/atom
Best (lowest) across sources
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.
On hull (stable)
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
6
3 databases, 2 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for Sr2CrO4, 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. |
|---|---|---|---|---|---|
| Pna21 (No. 33) | orthorhombic | 2.00 | 0.0000 | -7.478 | 4.69 |
| I4/mmm (No. 139) | tetragonal | 0.00 | 0.0339 | -7.444 | 5.38 |
| I4/mmm (No. 139) | — | — | — | — | — |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 5.12 |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 5.36 |
| I4/mmm (No. 139) | Tetragonal | — | — | — | 5.55 |
Uses
Applications
Where Sr2CrO4 is used.
Corrosion-resistant primersPigments for paints and coatingsMetal finishing processes
Reference
Frequently Asked Questions
Common questions about Sr2CrO4, answered from cross-validated data.
What is Sr2CrO4?
Strontium chromate is an inorganic compound that typically appears as a yellow crystalline solid. It is primarily utilized as a corrosion inhibitor in protective coatings and as a pigment in various industrial applications.
What is Sr2CrO4 used for?
Sr2CrO4 is used in corrosion-resistant primers, pigments for paints and coatings, and metal finishing processes.
What is the band gap of Sr2CrO4?
Sr2CrO4 has a DFT-computed band gap of 2.00 eV across 6 reported structures.
Is Sr2CrO4 a metal, semiconductor, or insulator?
With a band gap up to 2.00 eV it is a semiconductor.
Is Sr2CrO4 thermodynamically stable?
Yes — Sr2CrO4 sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of Sr2CrO4?
The lowest-energy reported polymorph of Sr2CrO4 is orthorhombic symmetry, space group Pna21 (No. 33).
What is the density of Sr2CrO4?
The computed density of the ground-state structure of Sr2CrO4 is 4.69 g/cm³.
How many polymorphs of Sr2CrO4 are known?
6 structures of Sr2CrO4 are reported across 3 databases, spanning 2 distinct space groups.
What elements does Sr2CrO4 contain?
Sr2CrO4 contains Cr, O, and Sr (3 elements).
Where does the data for Sr2CrO4 come from?
Sr2CrO4 data is cross-referenced from materials_project, jarvis, mpaloe.
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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).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
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