SrCu2B2O6
SrCu2B2O6 has a DFT band gap of 0.04 eV across 3 reported structures in 2 space groups; its reference structure is tetragonal (I4/mcm (No. 140)). Cross-validated across 1 computational databases.
At a glance
Key Properties
Cross-validated computational properties for SrCu2B2O6, aggregated across 1 database.
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.
0.04 eV
Range across DFT structures · ground state: narrow gap
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.
0.072 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
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
3
1 database, 2 space groups
Validation
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of SrCu2B2O6. 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.
0.87 / 1.00
Trust tier: medium
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
0.033 eV
EAH spread across sources
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
2
jarvis, materials_project
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Mixed (most: I4/mcm (No. 140))
Crystallography
Reported Structures
Lowest-energy structures reported for SrCu2B2O6, 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. |
|---|---|---|---|---|---|
| I4cm (No. 108) | tetragonal | 0.00 | 0.0386 | -7.104 | 3.90 |
| I4/mcm (No. 140) | tetragonal | 0.00 | 0.0392 | -7.104 | 3.89 |
| I-42m (No. 121) | tetragonal | 0.00 | 0.0434 | -7.099 | 3.91 |
| I-42m (No. 121) | tetragonal | 0.04 | 0.0720 | -2.049 | — |
| I4/mcm (No. 140) | tetragonal | 0.03 | 0.0720 | -2.049 | — |
| I-42m (No. 121) | tetragonal | 0.00 | 0.0720 | -2.049 | — |
| I-42m (No. 121) | tetragonal | — | — | — | 4.11 |
| I4/mcm (No. 140) | tetragonal | — | — | — | 4.10 |
| I4/mcm (No. 140) | tetragonal | — | — | — | 4.09 |
Synthesis
Synthesis Routes
Literature-extracted synthesis procedures targeting SrCu2B2O6.
Solid State
Procedure available · ceder_solid_state
Solid State
Procedure available · ceder_solid_state
Reference
Frequently Asked Questions
Common questions about SrCu2B2O6, answered from cross-validated data.
What is the band gap of SrCu2B2O6?
SrCu2B2O6 has a DFT-computed band gap of 0.04 eV across 3 reported structures. Standard DFT underestimates band gaps, so the measured gap is typically larger.
More questions
Is SrCu2B2O6 a metal, semiconductor, or insulator?
DFT predicts a near-zero band gap ((semi)metallic). Standard DFT underestimates gaps, so the real material may be a semiconductor.
Is SrCu2B2O6 thermodynamically stable?
SrCu2B2O6 has a lowest energy above hull of 0.072 eV/atom (metastable).
What is the crystal structure of SrCu2B2O6?
The reference structure of SrCu2B2O6 is tetragonal symmetry, space group I4/mcm (No. 140).
What is the density of SrCu2B2O6?
The computed density of the ground-state structure of SrCu2B2O6 is 3.89 g/cm³.
How many polymorphs of SrCu2B2O6 are known?
3 structures of SrCu2B2O6 are reported across 1 database, spanning 2 distinct space groups.
How is SrCu2B2O6 synthesized?
Literature-reported routes for SrCu2B2O6 include solid state (2 procedures documented).
What elements does SrCu2B2O6 contain?
SrCu2B2O6 contains B, Cu, O, and Sr (4 elements).
Where does the data for SrCu2B2O6 come from?
SrCu2B2O6 data is cross-referenced from materials_project, jarvis, cod.
Explore
Related Compounds
Other Cuprate Superconductors in the database.
Data sources & attribution
- materials_project — Data from the Materials Project (materialsproject.org). Cite: Jain et al., APL Materials 1, 011002 (2013). (CC-BY-4.0)
- jarvis — Data from JARVIS (jarvis.nist.gov), NIST. Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020). (LicenseRef-US-Gov-PD)
- cod — Data from the Crystallography Open Database (crystallography.net/cod/). Cite: Grazulis et al., J. Appl. Cryst. 42, 726 (2009). (CC0-1.0)
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