Si2W
Tungsten disilicide
Tungsten disilicide is a ceramic material known for its high thermal stability and resistance to oxidation. It is primarily utilized in the microelectronics industry as a conductive material for integrated circuits and as a protective coating in high-temperature environments.
Key Properties
Cross-validated computational properties for Si2W, 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 Si2W, 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. |
|---|---|---|---|---|---|
| I4/mmm (No. 139) | tetragonal | 0.00 | 0.0000 | -23.272 | 9.89 |
| P6222 (No. 180) | hexagonal | 0.03 | 0.0678 | -23.204 | 9.74 |
| P-1 (No. 2) | Triclinic | — | — | — | 6.71 |
| P-62m (No. 189) | Hexagonal | — | — | — | 9.32 |
| Cm (No. 8) | Monoclinic | — | — | — | 9.36 |
| Cm (No. 8) | Monoclinic | — | — | — | 5.82 |
| Cm (No. 8) | Monoclinic | — | — | — | 7.62 |
| P2/m (No. 10) | Monoclinic | — | — | — | 5.64 |
| P2/m (No. 10) | Monoclinic | — | — | — | 6.08 |
| P2/m (No. 10) | Monoclinic | — | — | — | 6.14 |
| Immm (No. 71) | Orthorhombic | — | — | — | 10.65 |
| Immm (No. 71) | Orthorhombic | — | — | — | 8.29 |
Applications
Where Si2W is used.
Frequently Asked Questions
Common questions about Si2W, answered from cross-validated data.
What is Si2W?
Tungsten disilicide is a ceramic material known for its high thermal stability and resistance to oxidation. It is primarily utilized in the microelectronics industry as a conductive material for integrated circuits and as a protective coating in high-temperature environments.
What is Si2W used for?
What is the band gap of Si2W?
Is Si2W a metal, semiconductor, or insulator?
Is Si2W thermodynamically stable?
What is the crystal structure of Si2W?
What is the density of Si2W?
How many polymorphs of Si2W are known?
What elements does Si2W contain?
Where does the data for Si2W come from?
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.
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