Er8Ge8O28
Er8Ge8O28 is a stable, insulating erbium-germanium oxide that is recognized for its well-defined structural characteristics.
About Er8Ge8O28
Er8Ge8O28 is a complex erbium-germanium oxide characterized by its wide-band-gap insulating electronic profile. As a thermodynamically stable phase residing on the convex hull, it represents a robust structural arrangement of its constituent elements. Its stability suggests potential for long-term performance in specialized environments where insulating properties are required. The material is notable for being well-represented across multiple structural databases, indicating a significant interest in its crystallographic configurations. This compound serves as a key example of how rare-earth elements interact with germanium-oxygen frameworks to create stable, high-insulation materials.
Key Properties
Cross-validated computational properties for Er8Ge8O28, 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 Er8Ge8O28, 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. |
|---|---|---|---|---|---|
| P41212 (No. 92) | tetragonal | 3.74 | 0.0000 | -7.895 | 6.99 |
| — | — | — | — | — | 6.70 |
| — | — | — | — | — | 6.79 |
| — | — | — | — | — | 6.79 |
| P41212 (No. 92) | — | — | — | — | — |
Applications
Where Er8Ge8O28 is used.
Frequently Asked Questions
Common questions about Er8Ge8O28, answered from cross-validated data.
What is Er8Ge8O28?
Er8Ge8O28 is a stable, insulating erbium-germanium oxide that is recognized for its well-defined structural characteristics.
What is Er8Ge8O28 used for?
What is the band gap of Er8Ge8O28?
Is Er8Ge8O28 a metal, semiconductor, or insulator?
Is Er8Ge8O28 thermodynamically stable?
What is the crystal structure of Er8Ge8O28?
What is the density of Er8Ge8O28?
How many polymorphs of Er8Ge8O28 are known?
What elements does Er8Ge8O28 contain?
Where does the data for Er8Ge8O28 come from?
How It Compares
As a unique oxide within its structural group, Er8Ge8O28 stands out for its thermodynamic stability and well-documented structural diversity. Unlike many complex oxides that may require specific synthesis conditions to maintain phase purity, this compound occupies a favorable energetic position, making it a reliable subject for fundamental research into rare-earth germanate systems.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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