SrO2
Strontium peroxide · Strontium dioxide
Strontium peroxide is a stable, semiconducting inorganic compound primarily used as an oxidizing agent and in pyrotechnic formulations.
About Strontium peroxide
Strontium peroxide is a thermodynamically stable inorganic compound that exists as a solid peroxide. Its electronic character is defined by semiconducting behavior, making it a unique member of the alkaline earth metal peroxide family.
This material is highly valued for its ability to release oxygen under specific conditions and its role in specialized chemical reactions. It is widely utilized in industrial applications where controlled oxidation or specific flame coloration is required.
Key Properties
Cross-validated computational properties for Strontium peroxide, 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 SrO2, 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. |
|---|---|---|---|---|---|
| I4/mmm (No. 139) | tetragonal | 2.85 | 0.0000 | -6.067 | 4.73 |
| Pnma (No. 62) | orthorhombic | 2.78 | 0.0096 | -6.058 | 3.99 |
| Pnma (No. 62) | orthorhombic | 2.98 | 0.0104 | -6.057 | 4.36 |
| Pnma (No. 62) | orthorhombic | 2.72 | 0.0110 | -6.056 | 4.36 |
| C2 (No. 5) | Monoclinic | — | — | — | 3.28 |
| P-1 (No. 2) | Triclinic | — | — | — | 6.42 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.58 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.60 |
| P1 (No. 1) | Triclinic | — | — | — | 2.45 |
| Cmmm (No. 65) | Orthorhombic | — | — | — | 3.51 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.78 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.57 |
Applications
Where Strontium peroxide is used.
Frequently Asked Questions
Common questions about Strontium peroxide, answered from cross-validated data.
What is SrO2?
Strontium peroxide is a stable, semiconducting inorganic compound primarily used as an oxidizing agent and in pyrotechnic formulations.
What is SrO2 used for?
What is the band gap of SrO2?
Is SrO2 a metal, semiconductor, or insulator?
Is SrO2 thermodynamically stable?
What is the crystal structure of SrO2?
What is the density of SrO2?
How many polymorphs of SrO2 are known?
What elements does SrO2 contain?
Where does the data for SrO2 come from?
How It Compares
As a prominent member of the alkaline earth peroxide group, strontium peroxide is noted for its high thermodynamic stability and well-documented structural diversity, serving as a benchmark material for understanding peroxide chemistry.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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