Al2Si2PbO8
Al2Si2PbO8 is a thermodynamically stable lead-containing aluminosilicate framework that functions as an electrical insulator.
About Al2Si2PbO8
Al2Si2PbO8 belongs to the complex family of aluminosilicates, characterized by a robust framework structure that incorporates lead into its lattice. As a thermodynamically stable phase, it maintains structural integrity under standard conditions, positioning it as a significant compound for understanding heavy-metal incorporation within mineral frameworks.
This material exhibits a wide-band-gap electronic character typical of insulating silicate structures. Its structural versatility is highlighted by multiple reported configurations, making it a valuable subject for researchers investigating the influence of large cations on the stability and properties of aluminosilicate networks.
Key Properties
Cross-validated computational properties for Al2Si2PbO8, 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 Al2Si2PbO8, 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 | 4.26 | 0.0000 | -7.847 | 4.00 |
| C2/c (No. 15) | monoclinic | 4.30 | 0.0008 | -7.846 | 4.03 |
| P21/c (No. 14) | monoclinic | 4.25 | 0.0014 | -7.845 | 4.00 |
| P-1 (No. 2) | triclinic | 4.30 | 0.0066 | -7.840 | 4.00 |
| No. 0 | unknown | — | — | — | 0.52 |
| C2/m (No. 12) | — | — | — | — | — |
Applications
Where Al2Si2PbO8 is used.
Frequently Asked Questions
Common questions about Al2Si2PbO8, answered from cross-validated data.
What is Al2Si2PbO8?
Al2Si2PbO8 is a thermodynamically stable lead-containing aluminosilicate framework that functions as an electrical insulator.
What is Al2Si2PbO8 used for?
What is the band gap of Al2Si2PbO8?
Is Al2Si2PbO8 a metal, semiconductor, or insulator?
Is Al2Si2PbO8 thermodynamically stable?
What is the crystal structure of Al2Si2PbO8?
What is the density of Al2Si2PbO8?
How many polymorphs of Al2Si2PbO8 are known?
What elements does Al2Si2PbO8 contain?
Where does the data for Al2Si2PbO8 come from?
How It Compares
Within the aluminosilicates and zeolite frameworks class.
Within the diverse class of aluminosilicates, Al2Si2PbO8 stands out for its inclusion of lead compared to lighter alkali or alkaline-earth counterparts like NaAlSi3O8 or Ca2Al2SiO7. While many members of this group are fundamental rock-forming minerals, this lead-bearing variant offers a distinct structural profile that contrasts with the more common framework architectures found in materials like KAlSiO4 or LiAlSiO4.
Related Compounds
Other Aluminosilicates and Zeolite Frameworks in the database.
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).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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