SrTiO3
Strontium titanate · ST, STO
Strontium titanate is a synthetic oxide material known for its high refractive index and excellent dielectric properties. It is widely utilized in advanced electronics and optical components due to its stable crystalline structure and versatile performance characteristics.
Key Properties
Cross-validated computational properties for Strontium titanate, 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 SrTiO3, 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/mcm (No. 140) | tetragonal | 1.85 | 0.0000 | -8.438 | 5.09 |
| I4/mcm (No. 140) | tetragonal | 1.79 | 0.0001 | -8.438 | 5.09 |
| Pm-3m (No. 221) | cubic | 1.77 | 0.0005 | -8.438 | 5.09 |
| P63/mmc (No. 194) | hexagonal | 1.74 | 0.0391 | -8.399 | 4.80 |
| I4/mcm (No. 140) | — | — | — | — | — |
| Pm-3m (No. 221) | — | — | — | — | — |
| I4/mcm (No. 140) | — | — | — | — | — |
| I4/mcm (No. 140) | Tetragonal | — | — | — | 4.97 |
| I4/mcm (No. 140) | Tetragonal | — | — | — | 5.21 |
| Pm-3m (No. 221) | Cubic | — | — | — | 5.09 |
| I4/mcm (No. 140) | Tetragonal | — | — | — | 5.09 |
| P63/mmc (No. 194) | Hexagonal | — | — | — | 4.91 |
Synthesis Routes
Literature-extracted synthesis procedures targeting SrTiO3.
Applications
Where Strontium titanate is used.
Frequently Asked Questions
Common questions about Strontium titanate, answered from cross-validated data.
What is SrTiO3?
Strontium titanate is a synthetic oxide material known for its high refractive index and excellent dielectric properties. It is widely utilized in advanced electronics and optical components due to its stable crystalline structure and versatile performance characteristics.
What is SrTiO3 used for?
What is the band gap of SrTiO3?
Is SrTiO3 a metal, semiconductor, or insulator?
Is SrTiO3 thermodynamically stable?
What is the crystal structure of SrTiO3?
What is the density of SrTiO3?
How many polymorphs of SrTiO3 are known?
How is SrTiO3 synthesized?
What elements does SrTiO3 contain?
Where does the data for SrTiO3 come from?
Related Compounds
Other Perovskite 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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