H9BrO4
H9BrO4 is a thermodynamically stable, wide-band-gap insulating compound composed of bromine, hydrogen, and oxygen.

About H9BrO4
H9BrO4 is a distinct chemical compound composed of bromine, hydrogen, and oxygen. As a thermodynamically stable material located on the convex hull, it represents a robust configuration within its structural landscape, characterized by its wide-band-gap insulating electronic nature.
Its structural complexity is evidenced by a significant number of reported configurations across material databases. This diversity highlights its versatility and potential utility in specialized research applications where stable, insulating materials are required for fundamental studies.
Key Properties
Cross-validated computational properties for H9BrO4, 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.
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 H9BrO4, 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 (No. 4) | monoclinic | 4.99 | 0.0000 | -5.854 | 1.90 |
| P1 (No. 1) | triclinic | 4.68 | 0.0000 | -4.904 | 1.82 |
| P21 (No. 4) | monoclinic | 4.33 | 0.0089 | -4.895 | 1.75 |
| P1 (No. 1) | triclinic | 3.68 | 0.0176 | -4.887 | 1.74 |
| P21 (No. 4) | monoclinic | 4.24 | 0.0179 | -4.886 | 1.80 |
| P1 (No. 1) | triclinic | 4.32 | 0.0202 | -4.884 | 1.78 |
| P21 (No. 4) | monoclinic | 4.44 | 0.0224 | -4.882 | 1.73 |
| P21 (No. 4) | monoclinic | 4.17 | 0.0244 | -4.880 | 1.66 |
| P1 (No. 1) | triclinic | 4.37 | 0.0257 | -4.878 | 1.70 |
| P21 (No. 4) | monoclinic | 4.07 | 0.0280 | -4.876 | 1.80 |
| P21 (No. 4) | monoclinic | 3.49 | 0.0500 | -4.854 | 1.74 |
| P1 (No. 1) | triclinic | 0.08 | 1.1827 | -3.721 | 1.74 |
Frequently Asked Questions
Common questions about H9BrO4, answered from cross-validated data.
What is H9BrO4?
H9BrO4 is a thermodynamically stable, wide-band-gap insulating compound composed of bromine, hydrogen, and oxygen.
What is the band gap of H9BrO4?
Is H9BrO4 a metal, semiconductor, or insulator?
Is H9BrO4 thermodynamically stable?
What is the crystal structure of H9BrO4?
What is the density of H9BrO4?
How many polymorphs of H9BrO4 are known?
What elements does H9BrO4 contain?
Where does the data for H9BrO4 come from?
How It Compares
As a unique entry in this chemical space, H9BrO4 serves as a foundational reference point for understanding the behavior of hydrogen-rich brominated oxides, providing a stable baseline for future investigations into similar insulating materials.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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