Mg14CuBiO16
Mg14CuBiO16 has a DFT band gap of 1.66–1.94 eV across 8 reported structures in 2 space groups; its lowest-energy polymorph is tetragonal (P4/mmm (No. 123)). Cross-validated across 2 computational databases.
At a glance
Key Properties
Cross-validated computational properties for Mg14CuBiO16, aggregated across 2 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.
1.66–1.94 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.
0.125 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.
Above hull
1 DFT source
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
8
2 databases, 2 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for Mg14CuBiO16, 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. |
|---|---|---|---|---|---|
| P4/mmm (No. 123) | tetragonal | 1.94 | 0.1252 | -6.129 | 4.34 |
| Pmmm (No. 47) | orthorhombic | 1.66 | 0.1275 | -6.127 | 4.34 |
| P4/mmm (No. 123) | Tetragonal | — | — | — | 4.34 |
| P4/mmm (No. 123) | Tetragonal | — | — | — | 4.55 |
| Pmmm (No. 47) | Orthorhombic | — | — | — | 4.34 |
| Pmmm (No. 47) | Orthorhombic | — | — | — | 4.48 |
| P4/mmm (No. 123) | Tetragonal | — | — | — | 4.49 |
| Pmmm (No. 47) | Orthorhombic | — | — | — | 4.55 |
Reference
Frequently Asked Questions
Common questions about Mg14CuBiO16, answered from cross-validated data.
What is the band gap of Mg14CuBiO16?
Mg14CuBiO16 has a DFT-computed band gap of 1.66–1.94 eV across 8 reported structures.
More questions
Is Mg14CuBiO16 a metal, semiconductor, or insulator?
With a band gap up to 1.94 eV it is a semiconductor.
Is Mg14CuBiO16 thermodynamically stable?
Mg14CuBiO16 has a lowest energy above hull of 0.125 eV/atom (above hull).
What is the crystal structure of Mg14CuBiO16?
The lowest-energy reported polymorph of Mg14CuBiO16 is tetragonal symmetry, space group P4/mmm (No. 123).
What is the density of Mg14CuBiO16?
The computed density of the ground-state structure of Mg14CuBiO16 is 4.34 g/cm³.
How many polymorphs of Mg14CuBiO16 are known?
8 structures of Mg14CuBiO16 are reported across 2 databases, spanning 2 distinct space groups.
What elements does Mg14CuBiO16 contain?
Mg14CuBiO16 contains Bi, Cu, Mg, and O (4 elements).
Where does the data for Mg14CuBiO16 come from?
Mg14CuBiO16 data is cross-referenced from materials_project, mpaloe.
Explore
Related Compounds
Other Cuprate Superconductors in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
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