GeBr2
Germanium dibromide · Germanium(II) bromide
Germanium dibromide is a chemical compound composed of germanium and bromine. It is primarily utilized as a precursor in chemical synthesis and materials science research for the deposition of germanium-containing thin films.
BrGe
Overview
Key Properties
Cross-validated computational properties for Germanium dibromide, 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.
1.43–2.83 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.
0.000 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.
On hull (stable)
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
58
4 databases, 19 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for GeBr2, 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 | 2.60 | 0.0000 | -3.560 | 3.64 |
| C2/c (No. 15) | monoclinic | 2.83 | 0.0110 | -14.037 | 3.88 |
| P42/mnm (No. 136) | tetragonal | 1.43 | 0.0327 | -3.528 | 4.22 |
| R-3m (No. 166) | — | — | — | — | — |
| P1 (No. 1) | Triclinic | — | — | — | 4.66 |
| P-6m2 (No. 187) | Hexagonal | — | — | — | 5.99 |
| C2 (No. 5) | Monoclinic | — | — | — | 3.64 |
| P21/m (No. 11) | Monoclinic | — | — | — | 2.64 |
| C2/c (No. 15) | Monoclinic | — | — | — | 2.35 |
| Pm (No. 6) | Monoclinic | — | — | — | 2.96 |
| P21/m (No. 11) | Monoclinic | — | — | — | 6.86 |
| P21/m (No. 11) | Monoclinic | — | — | — | 4.08 |
Uses
Applications
Where Germanium dibromide is used.
Chemical vapor depositionSemiconductor researchOrganic synthesis catalyst
Reference
Frequently Asked Questions
Common questions about Germanium dibromide, answered from cross-validated data.
What is GeBr2?
Germanium dibromide is a chemical compound composed of germanium and bromine. It is primarily utilized as a precursor in chemical synthesis and materials science research for the deposition of germanium-containing thin films.
More questions
What is GeBr2 used for?
Germanium dibromide (GeBr2) is used in chemical vapor deposition, semiconductor research, and organic synthesis catalyst.
What is the band gap of GeBr2?
Germanium dibromide (GeBr2) has a DFT-computed band gap of 1.43–2.83 eV across 58 reported structures.
Is GeBr2 a metal, semiconductor, or insulator?
With a band gap up to 2.83 eV it is a semiconductor.
Is GeBr2 thermodynamically stable?
Yes — Germanium dibromide (GeBr2) sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of GeBr2?
The lowest-energy reported polymorph of Germanium dibromide (GeBr2) is monoclinic symmetry, space group P21/c (No. 14).
What is the density of GeBr2?
The computed density of the ground-state structure of Germanium dibromide (GeBr2) is 3.64 g/cm³.
How many polymorphs of GeBr2 are known?
58 structures of GeBr2 are reported across 4 databases, spanning 19 distinct space groups.
What elements does GeBr2 contain?
Germanium dibromide (GeBr2) contains Br and Ge (2 elements).
Where does the data for GeBr2 come from?
GeBr2 data is cross-referenced from materials_project, jarvis, mpaloe.
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).
- mpaloe — Data from mpaloe.
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