UBrO5
UBrO5 is a semimetallic uranium-bromine-oxide compound characterized by its metastable nature and unique electronic properties.
About UBrO5
UBrO5 is a complex inorganic compound containing uranium, bromine, and oxygen. Its electronic character is defined as near-zero-gap, placing it in the semimetallic regime, which is a rare and intriguing property for this specific elemental combination.
Due to its position above the thermodynamic hull, UBrO5 is considered a metastable or unstable phase. Its existence in multiple reported structures suggests that while it may be difficult to synthesize or maintain, it remains a subject of interest for fundamental research into uranium-based chemical systems.
Key Properties
Cross-validated computational properties for UBrO5, 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 UBrO5, 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 | 0.00 | 0.1593 | -7.357 | 4.36 |
| P21/c (No. 14) | monoclinic | 0.03 | 0.1594 | -7.357 | 4.35 |
| No. 0 | unknown | — | — | — | 1.09 |
| P21/c (No. 14) | Monoclinic | — | — | — | 4.35 |
| P21/c (No. 14) | Monoclinic | — | — | — | 4.56 |
| P21/c (No. 14) | Monoclinic | — | — | — | 4.41 |
Frequently Asked Questions
Common questions about UBrO5, answered from cross-validated data.
What is UBrO5?
UBrO5 is a semimetallic uranium-bromine-oxide compound characterized by its metastable nature and unique electronic properties.
What is the band gap of UBrO5?
Is UBrO5 a metal, semiconductor, or insulator?
Is UBrO5 thermodynamically stable?
What is the crystal structure of UBrO5?
What is the density of UBrO5?
How many polymorphs of UBrO5 are known?
What elements does UBrO5 contain?
Where does the data for UBrO5 come from?
How It Compares
As a unique uranium-bromine-oxide phase, UBrO5 occupies a specialized niche in materials science. Unlike more common, highly stable uranium oxides, this compound represents a more exotic chemical state that challenges standard synthesis pathways and structural predictions.
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).
- mpaloe — Data from mpaloe.
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