CoTc
This is a binary intermetallic compound composed of cobalt and technetium. Due to the radioactive nature of technetium, this material is primarily of interest in fundamental condensed matter physics research rather than commercial applications.
CoTc
Overview
Key Properties
Cross-validated computational properties for CoTc, 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.
Metallic / not reported
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.
0.134 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.
34
4 databases, 10 space groups
Validation
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of CoTc. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
1.00 / 1.00
Trust tier: medium
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
0.000 eV
EAH spread across sources
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
2
jarvis, materials_project
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
All match
Crystallography
Reported Structures
Lowest-energy structures reported for CoTc, 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. |
|---|---|---|---|---|---|
| P-6m2 (No. 187) | hexagonal | 0.00 | 0.1337 | -19.471 | 10.30 |
| P-1 (No. 2) | Triclinic | — | — | — | 10.47 |
| Cm (No. 8) | Monoclinic | — | — | — | 9.93 |
| Cm (No. 8) | Monoclinic | — | — | — | 10.08 |
| P1 (No. 1) | Triclinic | — | — | — | 5.64 |
| P3m1 (No. 156) | Trigonal | — | — | — | 10.77 |
| P3m1 (No. 156) | Trigonal | — | — | — | 10.75 |
| C2 (No. 5) | Monoclinic | — | — | — | 11.49 |
| P1 (No. 1) | Triclinic | — | — | — | 8.12 |
| P1 (No. 1) | Triclinic | — | — | — | 3.70 |
| P1 (No. 1) | Triclinic | — | — | — | 5.94 |
| P-1 (No. 2) | Triclinic | — | — | — | 9.36 |
Uses
Applications
Where CoTc is used.
Fundamental materials researchSolid-state physics studies
Reference
Frequently Asked Questions
Common questions about CoTc, answered from cross-validated data.
What is CoTc?
This is a binary intermetallic compound composed of cobalt and technetium. Due to the radioactive nature of technetium, this material is primarily of interest in fundamental condensed matter physics research rather than commercial applications.
More questions
What is CoTc used for?
CoTc is used in fundamental materials research and solid-state physics studies.
What is the band gap of CoTc?
CoTc is computed to be metallic (no band gap) in the reported DFT structures.
Is CoTc a metal, semiconductor, or insulator?
Computed band structures report no gap, so it is metallic.
Is CoTc thermodynamically stable?
CoTc has a lowest energy above hull of 0.134 eV/atom (above hull).
What is the crystal structure of CoTc?
The lowest-energy reported polymorph of CoTc is hexagonal symmetry, space group P-6m2 (No. 187).
What is the density of CoTc?
The computed density of the ground-state structure of CoTc is 10.30 g/cm³.
How many polymorphs of CoTc are known?
34 structures of CoTc are reported across 4 databases, spanning 10 distinct space groups.
What elements does CoTc contain?
CoTc contains Co and Tc (2 elements).
Where does the data for CoTc come from?
CoTc data is cross-referenced from materials_project, mpaloe, cod.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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