Si7Ge
This material is a semiconductor alloy composed of silicon and germanium. It is primarily utilized in advanced electronics research to tune the electronic and structural properties of silicon-based devices.
Overview
Key Properties
Cross-validated computational properties for Si7Ge, aggregated across 3 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.
0.43 eV
Range across DFT structures
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.
0.003 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.
Near hull (likely stable)
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
5
3 databases, 1 space group
Crystallography
Reported Structures
Lowest-energy structures reported for Si7Ge, 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-43m (No. 215) | cubic | 0.43 | 0.0032 | -9.408 | 2.74 |
| P-43m (No. 215) | — | — | — | — | — |
| P-43m (No. 215) | Cubic | — | — | — | 2.78 |
| P-43m (No. 215) | Cubic | — | — | — | 2.69 |
| P-43m (No. 215) | Cubic | — | — | — | 2.74 |
Uses
Applications
Where Si7Ge is used.
Semiconductor device fabricationMicroelectronics researchOptoelectronic component development
Reference
Frequently Asked Questions
Common questions about Si7Ge, answered from cross-validated data.
What is Si7Ge?
This material is a semiconductor alloy composed of silicon and germanium. It is primarily utilized in advanced electronics research to tune the electronic and structural properties of silicon-based devices.
More questions
What is Si7Ge used for?
Si7Ge is used in semiconductor device fabrication, microelectronics research, and optoelectronic component development.
What is the band gap of Si7Ge?
Si7Ge has a DFT-computed band gap of 0.43 eV across 5 reported structures.
Is Si7Ge a metal, semiconductor, or insulator?
With a band gap up to 0.43 eV it is a semiconductor.
Is Si7Ge thermodynamically stable?
Si7Ge has a lowest energy above hull of 0.003 eV/atom (near hull (likely stable)).
What is the crystal structure of Si7Ge?
The lowest-energy reported polymorph of Si7Ge is cubic symmetry, space group P-43m (No. 215).
What is the density of Si7Ge?
The computed density of the ground-state structure of Si7Ge is 2.74 g/cm³.
How many polymorphs of Si7Ge are known?
5 structures of Si7Ge are reported across 3 databases, spanning 1 distinct space group.
What elements does Si7Ge contain?
Si7Ge contains Ge and Si (2 elements).
Where does the data for Si7Ge come from?
Si7Ge data is cross-referenced from materials_project, jarvis, mpaloe.
Explore
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).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
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