ScSi
Scandium silicide is a binary inorganic compound composed of scandium and silicon. It is primarily studied for its properties as a metallic silicide in materials science research.
Overview
Key Properties
Cross-validated computational properties for ScSi, 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.
0.000 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.
191
4 databases, 25 space groups
Validation
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of ScSi. 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 ScSi, 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. |
|---|---|---|---|---|---|
| Cmcm (No. 63) | orthorhombic | 0.00 | 0.0000 | -10.945 | 3.34 |
| F-43m (No. 216) | cubic | 0.00 | 1.3287 | -9.616 | 2.06 |
| P1 (No. 1) | Triclinic | — | — | — | 3.66 |
| P-1 (No. 2) | Triclinic | — | — | — | 1.86 |
| C2/m (No. 12) | Monoclinic | — | — | — | 2.03 |
| R-3m (No. 166) | Trigonal | — | — | — | 2.09 |
| P1 (No. 1) | Triclinic | — | — | — | 1.60 |
| Cm (No. 8) | Monoclinic | — | — | — | 2.05 |
| Cm (No. 8) | Monoclinic | — | — | — | 2.12 |
| P21/c (No. 14) | Monoclinic | — | — | — | 2.40 |
| P21/c (No. 14) | Monoclinic | — | — | — | 2.75 |
| P21/c (No. 14) | Monoclinic | — | — | — | 2.97 |
Uses
Applications
Where ScSi is used.
Semiconductor researchMaterials science studiesThin film development
Reference
Frequently Asked Questions
Common questions about ScSi, answered from cross-validated data.
What is ScSi?
Scandium silicide is a binary inorganic compound composed of scandium and silicon. It is primarily studied for its properties as a metallic silicide in materials science research.
More questions
What is ScSi used for?
ScSi is used in semiconductor research, materials science studies, and thin film development.
What is the band gap of ScSi?
ScSi is computed to be metallic (no band gap) in the reported DFT structures.
Is ScSi a metal, semiconductor, or insulator?
Computed band structures report no gap, so it is metallic.
Is ScSi thermodynamically stable?
Yes — ScSi sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of ScSi?
The lowest-energy reported polymorph of ScSi is orthorhombic symmetry, space group Cmcm (No. 63).
What is the density of ScSi?
The computed density of the ground-state structure of ScSi is 3.34 g/cm³.
How many polymorphs of ScSi are known?
191 structures of ScSi are reported across 4 databases, spanning 25 distinct space groups.
What elements does ScSi contain?
ScSi contains Sc and Si (2 elements).
Where does the data for ScSi come from?
ScSi data is cross-referenced from materials_project, mpaloe, jarvis.
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Related Compounds
Other Silicon Anode Materials in the database.
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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