KC
potassium graphite, potassium intercalated graphite
This material is a type of graphite intercalation compound formed by inserting potassium atoms between the layers of a graphite lattice. It is primarily used as a powerful reducing agent in organic synthesis and as a catalyst in various chemical reactions.
Key Properties
Cross-validated computational properties for KC, 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.
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 KC, 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. |
|---|---|---|---|---|---|
| I41/acd (No. 142) | tetragonal | 3.27 | 0.2661 | -7.743 | 1.58 |
| Fm-3m (No. 225) | cubic | 0.59 | 2.3343 | -5.674 | 1.43 |
| C2/c (No. 15) | monoclinic | 0.58 | 2.3348 | -5.674 | 1.44 |
| C2/m (No. 12) | monoclinic | 0.00 | 2.3348 | -5.674 | 1.44 |
| No. 0 | unknown | — | — | — | 0.20 |
| No. 0 | unknown | — | — | — | 0.10 |
| Fm-3m (No. 225) | — | — | — | — | — |
| P-1 (No. 2) | Triclinic | — | — | — | 1.33 |
| P-1 (No. 2) | Triclinic | — | — | — | 1.34 |
| Cm (No. 8) | Monoclinic | — | — | — | 1.35 |
| I41/acd (No. 142) | — | — | — | — | — |
| Cm (No. 8) | Monoclinic | — | — | — | 1.70 |
Applications
Where KC is used.
Frequently Asked Questions
Common questions about KC, answered from cross-validated data.
What is KC?
This material is a type of graphite intercalation compound formed by inserting potassium atoms between the layers of a graphite lattice. It is primarily used as a powerful reducing agent in organic synthesis and as a catalyst in various chemical reactions.
What is KC used for?
What is the band gap of KC?
Is KC a metal, semiconductor, or insulator?
Is KC thermodynamically stable?
What is the crystal structure of KC?
What is the density of KC?
How many polymorphs of KC are known?
What elements does KC contain?
Where does the data for KC come from?
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).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
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