Al4K4O28P8
Al4K4O28P8 is a stable, insulating aluminum potassium phosphate compound.
About Al4K4O28P8
Al4K4O28P8 is a complex phosphate material characterized by its insulating electronic nature and wide band gap. As a thermodynamically stable phase located on the convex hull, it represents a robust crystalline arrangement of aluminum, potassium, oxygen, and phosphorus atoms.
Its structural integrity makes it a subject of interest for fundamental solid-state research. The compound's stability suggests potential utility in specialized applications where insulating properties and chemical durability are required.
Key Properties
Cross-validated computational properties for Al4K4O28P8, 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 Al4K4O28P8, 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. |
|---|---|---|---|---|---|
| P21/c (No. 14) | monoclinic | 5.30 | 0.0000 | -7.512 | 2.80 |
| P21/c (No. 14) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 0.39 |
Applications
Where Al4K4O28P8 is used.
Frequently Asked Questions
Common questions about Al4K4O28P8, answered from cross-validated data.
What is Al4K4O28P8?
Al4K4O28P8 is a stable, insulating aluminum potassium phosphate compound.
What is Al4K4O28P8 used for?
What is the band gap of Al4K4O28P8?
Is Al4K4O28P8 a metal, semiconductor, or insulator?
Is Al4K4O28P8 thermodynamically stable?
What is the crystal structure of Al4K4O28P8?
What is the density of Al4K4O28P8?
How many polymorphs of Al4K4O28P8 are known?
What elements does Al4K4O28P8 contain?
Where does the data for Al4K4O28P8 come from?
How It Compares
As a distinct crystalline phosphate, Al4K4O28P8 serves as a stable reference point within its chemical family. Its position on the convex hull highlights its thermodynamic favorability compared to metastable configurations, establishing it as a reliable candidate for further experimental investigation.
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).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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