InPO4
InPO4 is a stable, semiconducting oxide material utilized in the study and development of transparent electronic and optoelectronic devices.
About InPO4
Indium phosphate is a thermodynamically stable compound that exists on the convex hull, indicating robust structural integrity. As a semiconducting member of the oxide family, it serves as a foundational material for research into electronic components that require specific charge transport properties. Its structural versatility is highlighted by the multiple reported phases found across major materials databases. This material is primarily investigated for its potential in optoelectronic applications where transparency and controlled conductivity are essential. By leveraging the unique electronic character of the indium-phosphorus-oxygen system, researchers aim to develop more efficient thin-film devices and specialized sensor platforms.
Key Properties
Cross-validated computational properties for InPO4, 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of InPO4. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for InPO4, 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. |
|---|---|---|---|---|---|
| — | — | 3.28 | 0.0000 | -2.330 | — |
| Cmcm (No. 63) | orthorhombic | 2.63 | 0.0000 | -2.111 | — |
| Cmcm (No. 63) | orthorhombic | 2.35 | 0.0000 | -7.133 | 4.78 |
| — | — | 2.83 | 0.0014 | -2.329 | — |
| Pnma (No. 62) | orthorhombic | 2.73 | 0.0061 | -7.126 | 4.67 |
| Pnma (No. 62) | orthorhombic | 3.06 | 0.0075 | -2.103 | — |
| — | — | 3.14 | 0.0242 | -2.306 | — |
| — | — | 3.19 | 0.0513 | -2.279 | — |
| — | — | 3.36 | 0.0653 | -2.265 | — |
| — | — | 2.35 | 0.0654 | -2.265 | — |
| — | — | 2.96 | 0.0855 | -2.244 | — |
| — | — | 0.00 | 0.1019 | -2.228 | — |
Synthesis Routes
Literature-extracted synthesis procedures targeting InPO4.
Applications
Where InPO4 is used.
Frequently Asked Questions
Common questions about InPO4, answered from cross-validated data.
What is InPO4?
InPO4 is a stable, semiconducting oxide material utilized in the study and development of transparent electronic and optoelectronic devices.
What is InPO4 used for?
What is the band gap of InPO4?
Is InPO4 a metal, semiconductor, or insulator?
Is InPO4 thermodynamically stable?
What is the crystal structure of InPO4?
How many polymorphs of InPO4 are known?
How is InPO4 synthesized?
What elements does InPO4 contain?
Where does the data for InPO4 come from?
How It Compares
Within the transparent conducting oxides class.
Within the class of transparent conducting oxides, InPO4 occupies a distinct niche compared to well-known materials like ZnO or BaSnO3. While ZnO is widely utilized for its high mobility and established industrial manufacturing processes, InPO4 offers a different structural framework that provides researchers with an alternative pathway for tuning electronic properties. Unlike the complex spinel structures found in ZnGa2O4 or ZnCr2O4, InPO4 provides a simpler, stable platform that is valuable for fundamental studies in semiconductor physics.
Related Compounds
Other Transparent Conducting Oxides in the database.
Data sources & attribution
- oqmd — Data from the OQMD (oqmd.org). Cite: Saal et al., JOM 65, 1501 (2013); Kirklin et al., npj Comp. Mater. 1, 15010 (2015). (CC-BY-4.0)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- cod — Data from the Crystallography Open Database (crystallography.net/cod/). Cite: Grazulis et al., J. Appl. Cryst. 42, 726 (2009). (CC0-1.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
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