Ge8Ho8O28
Ge8Ho8O28 is a thermodynamically stable, insulating oxide compound containing germanium and holmium.
About Ge8Ho8O28
Ge8Ho8O28 is a complex oxide composed of germanium, holmium, and oxygen. As a thermodynamically stable phase located on the convex hull, it represents a robust crystalline arrangement that maintains structural integrity under standard conditions.
This material functions as a wide-gap insulator, a characteristic that makes it an interesting candidate for specialized dielectric or optical applications. Its existence across multiple structural databases highlights its significance as a well-defined inorganic compound.
Key Properties
Cross-validated computational properties for Ge8Ho8O28, 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 Ge8Ho8O28, 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. |
|---|---|---|---|---|---|
| Fd-3m (No. 227) | cubic | 3.25 | 0.0000 | -7.913 | 8.07 |
| P41212 (No. 92) | tetragonal | 3.75 | 0.0223 | -7.891 | 6.86 |
| C2/m (No. 12) | monoclinic | 3.85 | 0.0361 | -7.877 | 6.37 |
| P-1 (No. 2) | triclinic | 3.66 | 0.0559 | -7.858 | 6.80 |
| P41212 (No. 92) | — | — | — | — | — |
| — | — | — | — | — | 5.16 |
Applications
Where Ge8Ho8O28 is used.
Frequently Asked Questions
Common questions about Ge8Ho8O28, answered from cross-validated data.
What is Ge8Ho8O28?
Ge8Ho8O28 is a thermodynamically stable, insulating oxide compound containing germanium and holmium.
What is Ge8Ho8O28 used for?
What is the band gap of Ge8Ho8O28?
Is Ge8Ho8O28 a metal, semiconductor, or insulator?
Is Ge8Ho8O28 thermodynamically stable?
What is the crystal structure of Ge8Ho8O28?
What is the density of Ge8Ho8O28?
How many polymorphs of Ge8Ho8O28 are known?
What elements does Ge8Ho8O28 contain?
Where does the data for Ge8Ho8O28 come from?
How It Compares
As a distinct oxide within the broader landscape of rare-earth germanates, Ge8Ho8O28 serves as a stable reference point for understanding the interplay between heavy lanthanides and germanium-oxygen frameworks.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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