Ho2O8V2
Holmium vanadate · HoVO4
Holmium vanadate is a crystalline inorganic compound that belongs to the zircon-type structure family. It is primarily utilized in advanced physics research due to its unique magnetic properties at low temperatures.
HoOV
Overview
Key Properties
Cross-validated computational properties for Holmium vanadate, 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.
0.88–2.98 eV
Range across DFT structures
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.
0.000 eV/atom
Best (lowest) across sources
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.
On hull (stable)
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
9
3 databases, 2 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for Ho2O8V2, 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 | 2.98 | 0.0000 | -8.788 | 5.89 |
| I41/a (No. 88) | tetragonal | 2.75 | 0.0365 | -8.751 | 6.69 |
| I41/amd (No. 141) | tetragonal | 0.88 | 2.9124 | -5.876 | 0.21 |
| I41/amd (No. 141) | — | — | — | — | — |
| I41/amd (No. 141) | — | — | — | — | — |
| I41/amd (No. 141) | — | — | — | — | — |
| I41/amd (No. 141) | — | — | — | — | — |
| — | — | — | — | — | 5.18 |
| — | — | — | — | — | 5.84 |
Uses
Applications
Where Holmium vanadate is used.
Magnetic refrigeration researchSolid-state physics studiesLaser host materials
Reference
Frequently Asked Questions
Common questions about Holmium vanadate, answered from cross-validated data.
What is Ho2O8V2?
Holmium vanadate is a crystalline inorganic compound that belongs to the zircon-type structure family. It is primarily utilized in advanced physics research due to its unique magnetic properties at low temperatures.
More questions
What is Ho2O8V2 used for?
Holmium vanadate (Ho2O8V2) is used in magnetic refrigeration research, solid-state physics studies, and laser host materials.
What is the band gap of Ho2O8V2?
Holmium vanadate (Ho2O8V2) has a DFT-computed band gap of 0.88–2.98 eV across 9 reported structures.
Is Ho2O8V2 a metal, semiconductor, or insulator?
With a band gap up to 2.98 eV it is a semiconductor.
Is Ho2O8V2 thermodynamically stable?
Yes — Holmium vanadate (Ho2O8V2) sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of Ho2O8V2?
The lowest-energy reported polymorph of Holmium vanadate (Ho2O8V2) is tetragonal symmetry, space group I41/amd (No. 141).
What is the density of Ho2O8V2?
The computed density of the ground-state structure of Holmium vanadate (Ho2O8V2) is 5.89 g/cm³.
How many polymorphs of Ho2O8V2 are known?
9 structures of Ho2O8V2 are reported across 3 databases, spanning 2 distinct space groups.
What elements does Ho2O8V2 contain?
Holmium vanadate (Ho2O8V2) contains Ho, O, and V (3 elements).
Where does the data for Ho2O8V2 come from?
Ho2O8V2 data is cross-referenced from materials_project, aflow, omat24.
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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