ScTc2
Scandium technetide is an intermetallic compound composed of scandium and the radioactive element technetium. It is primarily studied in the context of fundamental solid-state chemistry and materials science research regarding the properties of transition metal alloys.
Key Properties
Cross-validated computational properties for ScTc2, 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 ScTc2, 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. |
|---|---|---|---|---|---|
| P63/mmc (No. 194) | hexagonal | 0.00 | 0.0000 | -9.323 | 7.81 |
| C2/m (No. 12) | Monoclinic | — | — | — | 6.26 |
| P-1 (No. 2) | Triclinic | — | — | — | 8.38 |
| P-1 (No. 2) | Triclinic | — | — | — | 5.58 |
| Pmma (No. 51) | Orthorhombic | — | — | — | 9.64 |
| C2/m (No. 12) | Monoclinic | — | — | — | 6.92 |
| P-1 (No. 2) | Triclinic | — | — | — | 6.37 |
| P-1 (No. 2) | Triclinic | — | — | — | 9.22 |
| P21/m (No. 11) | Monoclinic | — | — | — | 8.14 |
| Cmcm (No. 63) | Orthorhombic | — | — | — | 7.39 |
| Cm (No. 8) | Monoclinic | — | — | — | 6.63 |
| P3m1 (No. 156) | Trigonal | — | — | — | 7.87 |
Applications
Where ScTc2 is used.
Frequently Asked Questions
Common questions about ScTc2, answered from cross-validated data.
What is ScTc2?
Scandium technetide is an intermetallic compound composed of scandium and the radioactive element technetium. It is primarily studied in the context of fundamental solid-state chemistry and materials science research regarding the properties of transition metal alloys.
What is ScTc2 used for?
What is the band gap of ScTc2?
Is ScTc2 a metal, semiconductor, or insulator?
Is ScTc2 thermodynamically stable?
What is the crystal structure of ScTc2?
What is the density of ScTc2?
How many polymorphs of ScTc2 are known?
What elements does ScTc2 contain?
Where does the data for ScTc2 come from?
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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