Bi2Te
Bi2Te has a DFT band gap of Metallic / not reported across 25 reported structures in 10 space groups; its reference structure is tetragonal (I-42d (No. 122)). Cross-validated across 4 computational databases.
At a glance
Key Properties
Cross-validated computational properties for Bi2Te, aggregated across 4 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.
Metallic / not reported
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.
0.084 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.
Metastable
3 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
25
4 databases, 10 space groups
Validation
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of Bi2Te. 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.
0.86 / 1.00
Trust tier: high
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
0.036 eV
EAH spread across sources
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
3
jarvis, materials_project, oqmd
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Mixed (most: I-42d (No. 122))
Crystallography
Reported Structures
Lowest-energy structures reported for Bi2Te, 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. |
|---|---|---|---|---|---|
| I41/amd (No. 141) | tetragonal | 0.00 | 0.0838 | -0.051 | — |
| — | — | 0.00 | 0.1039 | -0.029 | — |
| I-42d (No. 122) | tetragonal | 0.00 | 0.1199 | -47.506 | 8.88 |
| — | — | 0.00 | 0.2461 | 0.113 | — |
| — | — | 0.00 | 0.2665 | 0.134 | — |
| — | — | 0.00 | 0.3639 | 0.231 | — |
| — | — | 0.00 | 0.4848 | 0.352 | — |
| Pm (No. 6) | monoclinic | — | — | — | 14.40 |
| I-42d (No. 122) | tetragonal | — | — | — | 8.88 |
| Pc (No. 7) | monoclinic | — | — | — | 7.99 |
| Pc (No. 7) | monoclinic | — | — | — | 11.47 |
| P2/c (No. 13) | monoclinic | — | — | — | 5.47 |
Synthesis
Synthesis Routes
Literature-extracted synthesis procedures targeting Bi2Te.
Solid State
Procedure available · ceder_solid_state
Solid State
Procedure available · ceder_solid_state
Reference
Frequently Asked Questions
Common questions about Bi2Te, answered from cross-validated data.
What is the band gap of Bi2Te?
The reported DFT structures of Bi2Te show no band gap. Standard DFT often misses gaps (especially in transition-metal oxides), so this is not proof the real material is a metal.
More questions
Is Bi2Te a metal, semiconductor, or insulator?
DFT calculations predict no band gap. Standard DFT can miss gaps, so measurements are needed to confirm metallic behavior.
Is Bi2Te thermodynamically stable?
Bi2Te has a lowest energy above hull of 0.084 eV/atom (metastable).
What is the crystal structure of Bi2Te?
The reference structure of Bi2Te is tetragonal symmetry, space group I-42d (No. 122).
What is the density of Bi2Te?
The computed density of the ground-state structure of Bi2Te is 8.88 g/cm³.
How many polymorphs of Bi2Te are known?
25 structures of Bi2Te are reported across 4 databases, spanning 10 distinct space groups.
How is Bi2Te synthesized?
Literature-reported routes for Bi2Te include solid state (2 procedures documented).
What elements does Bi2Te contain?
Bi2Te contains Bi and Te (2 elements).
Where does the data for Bi2Te come from?
Bi2Te data is cross-referenced from jarvis, oqmd, materials_project, mpaloe.
Explore
Related Compounds
Other Bismuth Chalcogenide Thermoelectrics in the database.
Data sources & attribution
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- 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)
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- mpaloe — Data from MP-ALOE. Cite: Kuner et al., npj Comput. Mater. (2025), doi:10.1038/s41524-025-01834-9.
Analyze Bi2Te in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 85 source databases.
Explore the Platform →