Al4Mg4O20P4
Al4Mg4O20P4 is a thermodynamically stable, insulating inorganic compound composed of aluminum, magnesium, oxygen, and phosphorus.
About Al4Mg4O20P4
Al4Mg4O20P4 is a complex inorganic compound characterized by its insulating electronic nature and high thermodynamic stability. Occupying a position on the convex hull, it represents a robust structural arrangement of aluminum, magnesium, oxygen, and phosphorus atoms.
Its wide-gap insulating profile makes it a subject of interest for fundamental materials research. The existence of multiple reported structural configurations highlights the versatility of this composition in solid-state chemistry.
Key Properties
Cross-validated computational properties for Al4Mg4O20P4, 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 Al4Mg4O20P4, 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 | 5.13 | 0.0000 | -7.596 | 2.74 |
| P21/c (No. 14) | monoclinic | 5.09 | 0.0041 | -7.592 | 2.81 |
| No. 0 | unknown | — | — | — | 0.83 |
| P21/c (No. 14) | — | — | — | — | — |
| P21/c (No. 14) | — | — | — | — | — |
| P21/c (No. 14) | — | — | — | — | — |
Frequently Asked Questions
Common questions about Al4Mg4O20P4, answered from cross-validated data.
What is Al4Mg4O20P4?
Al4Mg4O20P4 is a thermodynamically stable, insulating inorganic compound composed of aluminum, magnesium, oxygen, and phosphorus.
What is the band gap of Al4Mg4O20P4?
Is Al4Mg4O20P4 a metal, semiconductor, or insulator?
Is Al4Mg4O20P4 thermodynamically stable?
What is the crystal structure of Al4Mg4O20P4?
What is the density of Al4Mg4O20P4?
How many polymorphs of Al4Mg4O20P4 are known?
What elements does Al4Mg4O20P4 contain?
Where does the data for Al4Mg4O20P4 come from?
How It Compares
As a unique inorganic phase, Al4Mg4O20P4 stands as a stable representative of complex phosphate-based materials. While it lacks direct structural siblings in this specific dataset, its position on the convex hull establishes it as a baseline for investigating the stability and electronic properties of multi-element oxide-phosphate systems.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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