Rb2Se
Rubidium selenide is an inorganic compound composed of rubidium and selenium. It is primarily utilized as a specialized precursor in the synthesis of semiconductor materials and thin-film devices.
RbSe
Overview
Key Properties
Cross-validated computational properties for Rb2Se, 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.
1.80 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.
20
3 databases, 5 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for Rb2Se, 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. |
|---|---|---|---|---|---|
| Fm-3m (No. 225) | cubic | 1.80 | 0.0000 | -3.026 | 3.17 |
| Fm-3m (No. 225) | Cubic | — | — | — | 3.18 |
| P-1 (No. 2) | Triclinic | — | — | — | 3.83 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.24 |
| P-1 (No. 2) | Triclinic | — | — | — | 1.91 |
| P63/mmc (No. 194) | Hexagonal | — | — | — | 2.80 |
| C2/m (No. 12) | Monoclinic | — | — | — | 3.81 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.67 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.66 |
| P-1 (No. 2) | Triclinic | — | — | — | 3.24 |
| Fm-3m (No. 225) | — | — | — | — | — |
| Fm-3m (No. 225) | Cubic | — | — | — | 3.15 |
Uses
Applications
Where Rb2Se is used.
Semiconductor researchThin-film depositionMaterials science synthesis
Reference
Frequently Asked Questions
Common questions about Rb2Se, answered from cross-validated data.
What is Rb2Se?
Rubidium selenide is an inorganic compound composed of rubidium and selenium. It is primarily utilized as a specialized precursor in the synthesis of semiconductor materials and thin-film devices.
More questions
What is Rb2Se used for?
Rb2Se is used in semiconductor research, thin-film deposition, and materials science synthesis.
What is the band gap of Rb2Se?
Rb2Se has a DFT-computed band gap of 1.80 eV across 20 reported structures.
Is Rb2Se a metal, semiconductor, or insulator?
With a band gap up to 1.80 eV it is a semiconductor.
Is Rb2Se thermodynamically stable?
Yes — Rb2Se sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of Rb2Se?
The lowest-energy reported polymorph of Rb2Se is cubic symmetry, space group Fm-3m (No. 225).
What is the density of Rb2Se?
The computed density of the ground-state structure of Rb2Se is 3.17 g/cm³.
How many polymorphs of Rb2Se are known?
20 structures of Rb2Se are reported across 3 databases, spanning 5 distinct space groups.
What elements does Rb2Se contain?
Rb2Se contains Rb and Se (2 elements).
Where does the data for Rb2Se come from?
Rb2Se data is cross-referenced from materials_project, mpaloe, jarvis.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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