Sr2Ge
Strontium germanide is a binary intermetallic compound composed of strontium and germanium. It is primarily studied in the field of solid-state chemistry for its structural properties and potential electronic characteristics.
GeSr
Overview
Key Properties
Cross-validated computational properties for Sr2Ge, 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.
0.36 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.
0.000 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.
12
4 databases, 5 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for Sr2Ge, 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. |
|---|---|---|---|---|---|
| Pnma (No. 62) | orthorhombic | 0.36 | 0.0000 | -15.342 | 4.07 |
| Pnnm (No. 58) | Orthorhombic | — | — | — | 2.70 |
| P21/c (No. 14) | Monoclinic | — | — | — | 2.56 |
| P21/c (No. 14) | Monoclinic | — | — | — | 2.54 |
| Cm (No. 8) | Monoclinic | — | — | — | 3.52 |
| Cm (No. 8) | Monoclinic | — | — | — | 3.11 |
| Cm (No. 8) | Monoclinic | — | — | — | 2.96 |
| Pnma (No. 62) | — | — | — | — | — |
| No. 0 | unknown | — | — | — | 1.02 |
| Pnma (No. 62) | Orthorhombic | — | — | — | 4.00 |
| Pnma (No. 62) | Orthorhombic | — | — | — | 4.08 |
| Pnma (No. 62) | Orthorhombic | — | — | — | 4.06 |
Uses
Applications
Where Sr2Ge is used.
Materials science researchSolid-state physics studiesSemiconductor precursor research
Reference
Frequently Asked Questions
Common questions about Sr2Ge, answered from cross-validated data.
What is Sr2Ge?
Strontium germanide is a binary intermetallic compound composed of strontium and germanium. It is primarily studied in the field of solid-state chemistry for its structural properties and potential electronic characteristics.
More questions
What is Sr2Ge used for?
Sr2Ge is used in materials science research, solid-state physics studies, and semiconductor precursor research.
What is the band gap of Sr2Ge?
Sr2Ge has a DFT-computed band gap of 0.36 eV across 12 reported structures.
Is Sr2Ge a metal, semiconductor, or insulator?
With a band gap up to 0.36 eV it is a semiconductor.
Is Sr2Ge thermodynamically stable?
Yes — Sr2Ge sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of Sr2Ge?
The lowest-energy reported polymorph of Sr2Ge is orthorhombic symmetry, space group Pnma (No. 62).
What is the density of Sr2Ge?
The computed density of the ground-state structure of Sr2Ge is 4.07 g/cm³.
How many polymorphs of Sr2Ge are known?
12 structures of Sr2Ge are reported across 4 databases, spanning 5 distinct space groups.
What elements does Sr2Ge contain?
Sr2Ge contains Ge and Sr (2 elements).
Where does the data for Sr2Ge come from?
Sr2Ge data is cross-referenced from materials_project, mpaloe, jarvis, cod.
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).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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