As2Ho2O8
As2Ho2O8 is a stable, insulating holmium arsenate compound used in materials research.
About As2Ho2O8
As2Ho2O8 is a holmium-based arsenate characterized by its wide-gap insulating electronic profile. As a thermodynamically stable compound residing on the convex hull, it represents a robust structural arrangement of holmium, arsenic, and oxygen atoms.
This material is of interest for fundamental research into rare-earth arsenates. Its stability and insulating nature make it a candidate for studies involving dielectric properties and complex oxide frameworks where electronic isolation is required.
Key Properties
Cross-validated computational properties for As2Ho2O8, 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 As2Ho2O8, 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. |
|---|---|---|---|---|---|
| I41/amd (No. 141) | tetragonal | 3.61 | 0.0000 | -7.691 | 6.50 |
| P21/c (No. 14) | monoclinic | 3.96 | 0.0692 | -7.622 | 6.66 |
| I41/amd (No. 141) | — | — | — | — | — |
| — | — | — | — | — | 6.27 |
Applications
Where As2Ho2O8 is used.
Frequently Asked Questions
Common questions about As2Ho2O8, answered from cross-validated data.
What is As2Ho2O8?
As2Ho2O8 is a stable, insulating holmium arsenate compound used in materials research.
What is As2Ho2O8 used for?
What is the band gap of As2Ho2O8?
Is As2Ho2O8 a metal, semiconductor, or insulator?
Is As2Ho2O8 thermodynamically stable?
What is the crystal structure of As2Ho2O8?
What is the density of As2Ho2O8?
How many polymorphs of As2Ho2O8 are known?
What elements does As2Ho2O8 contain?
Where does the data for As2Ho2O8 come from?
How It Compares
As a standalone entry in this dataset, As2Ho2O8 serves as a benchmark for the stability of holmium-based arsenate systems. Its position on the convex hull highlights it as a naturally favored configuration, providing a reference point for future investigations into similar rare-earth oxyanion compounds.
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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