Sr2GeO4
Sr2GeO4 is a thermodynamically stable, wide-gap insulating oxide composed of strontium, germanium, and oxygen.
About Sr2GeO4
Sr2GeO4 is a thermodynamically stable oxide compound that sits firmly on the convex hull, indicating significant structural robustness. As a wide-gap insulator, it possesses electronic properties characteristic of materials that resist electrical conduction, making it a subject of interest for fundamental materials research.
Its structural versatility is highlighted by the existence of multiple distinct crystalline phases reported in databases. This diversity in structural arrangements allows researchers to investigate how atomic coordination influences the physical behavior of strontium germanates in various technological contexts.
Key Properties
Cross-validated computational properties for Sr2GeO4, 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 Sr2GeO4, 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 | 3.68 | 0.0000 | -6.883 | 4.97 |
| P21/c (No. 14) | monoclinic | 3.54 | 0.0003 | -6.883 | 4.95 |
| P21/c (No. 14) | Monoclinic | — | — | — | 4.79 |
| P21/c (No. 14) | Monoclinic | — | — | — | 5.02 |
| P21/c (No. 14) | Monoclinic | — | — | — | 4.89 |
| Pnma (No. 62) | orthorhombic | — | — | — | 4.95 |
Applications
Where Sr2GeO4 is used.
Frequently Asked Questions
Common questions about Sr2GeO4, answered from cross-validated data.
What is Sr2GeO4?
Sr2GeO4 is a thermodynamically stable, wide-gap insulating oxide composed of strontium, germanium, and oxygen.
What is Sr2GeO4 used for?
What is the band gap of Sr2GeO4?
Is Sr2GeO4 a metal, semiconductor, or insulator?
Is Sr2GeO4 thermodynamically stable?
What is the crystal structure of Sr2GeO4?
What is the density of Sr2GeO4?
How many polymorphs of Sr2GeO4 are known?
What elements does Sr2GeO4 contain?
Where does the data for Sr2GeO4 come from?
How It Compares
As a stable member of the strontium germanate family, Sr2GeO4 serves as a foundational reference point for understanding the phase stability and insulating behavior of complex oxides within this chemical system.
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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