RbC2
Rubidium dicarbide is a metallic compound consisting of rubidium and carbon. It is primarily studied in the field of solid-state chemistry for its structural properties and potential behavior as a synthetic precursor.
CRb
Overview
Key Properties
Cross-validated computational properties for RbC2, 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.
0.04 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.
1.328 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.
Above hull
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
36
4 databases, 10 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for RbC2, 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. |
|---|---|---|---|---|---|
| P4/nmm (No. 129) | tetragonal | 0.04 | 1.3277 | -5.177 | 2.18 |
| Cm (No. 8) | Monoclinic | — | — | — | 1.98 |
| Cm (No. 8) | Monoclinic | — | — | — | 3.26 |
| Cm (No. 8) | Monoclinic | — | — | — | 3.55 |
| Cm (No. 8) | Monoclinic | — | — | — | 2.40 |
| C2/m (No. 12) | Monoclinic | — | — | — | 3.04 |
| C2/m (No. 12) | Monoclinic | — | — | — | 7.19 |
| Cm (No. 8) | Monoclinic | — | — | — | 1.59 |
| P-1 (No. 2) | Triclinic | — | — | — | 1.71 |
| P-1 (No. 2) | Triclinic | — | — | — | 1.56 |
| Cm (No. 8) | Monoclinic | — | — | — | 1.98 |
| C2/m (No. 12) | Monoclinic | — | — | — | 1.51 |
Uses
Applications
Where RbC2 is used.
Materials science researchSolid-state chemistry studies
Reference
Frequently Asked Questions
Common questions about RbC2, answered from cross-validated data.
What is RbC2?
Rubidium dicarbide is a metallic compound consisting of rubidium and carbon. It is primarily studied in the field of solid-state chemistry for its structural properties and potential behavior as a synthetic precursor.
More questions
What is RbC2 used for?
RbC2 is used in materials science research and solid-state chemistry studies.
What is the band gap of RbC2?
RbC2 has a DFT-computed band gap of 0.04 eV across 36 reported structures.
Is RbC2 a metal, semiconductor, or insulator?
With a near-zero band gap it behaves as a (semi)metal.
Is RbC2 thermodynamically stable?
RbC2 has a lowest energy above hull of 1.328 eV/atom (above hull).
What is the crystal structure of RbC2?
The lowest-energy reported polymorph of RbC2 is tetragonal symmetry, space group P4/nmm (No. 129).
What is the density of RbC2?
The computed density of the ground-state structure of RbC2 is 2.18 g/cm³.
How many polymorphs of RbC2 are known?
36 structures of RbC2 are reported across 4 databases, spanning 10 distinct space groups.
What elements does RbC2 contain?
RbC2 contains C and Rb (2 elements).
Where does the data for RbC2 come from?
RbC2 data is cross-referenced from materials_project, mpaloe, jarvis, cod.
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).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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