SrGe2
Strontium digermanide is an intermetallic compound composed of strontium and germanium. It is primarily studied for its structural properties and potential utility in advanced materials research.
GeSr
Overview
Key Properties
Cross-validated computational properties for SrGe2, 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.
0.34 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.
19
3 databases, 7 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for SrGe2, 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-3m1 (No. 164) | trigonal | 0.00 | 0.0000 | -14.855 | 5.08 |
| Pnma (No. 62) | orthorhombic | 0.34 | 0.0149 | -14.840 | 4.75 |
| Pnma (No. 62) | Orthorhombic | — | — | — | 4.80 |
| P-3m1 (No. 164) | Trigonal | — | — | — | 5.09 |
| P-3m1 (No. 164) | Trigonal | — | — | — | 5.11 |
| P-3m1 (No. 164) | Trigonal | — | — | — | 4.94 |
| Pnma (No. 62) | Orthorhombic | — | — | — | 4.72 |
| P-1 (No. 2) | Triclinic | — | — | — | 2.83 |
| P2/m (No. 10) | Monoclinic | — | — | — | 2.64 |
| P1 (No. 1) | Triclinic | — | — | — | 4.79 |
| Pnma (No. 62) | — | — | — | — | — |
| Cm (No. 8) | Monoclinic | — | — | — | 3.50 |
Uses
Applications
Where SrGe2 is used.
Materials science researchSemiconductor development studies
Reference
Frequently Asked Questions
Common questions about SrGe2, answered from cross-validated data.
What is SrGe2?
Strontium digermanide is an intermetallic compound composed of strontium and germanium. It is primarily studied for its structural properties and potential utility in advanced materials research.
More questions
What is SrGe2 used for?
SrGe2 is used in materials science research and semiconductor development studies.
What is the band gap of SrGe2?
SrGe2 has a DFT-computed band gap of 0.34 eV across 19 reported structures.
Is SrGe2 a metal, semiconductor, or insulator?
With a band gap up to 0.34 eV it is a semiconductor.
Is SrGe2 thermodynamically stable?
Yes — SrGe2 sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of SrGe2?
The lowest-energy reported polymorph of SrGe2 is trigonal symmetry, space group P-3m1 (No. 164).
What is the density of SrGe2?
The computed density of the ground-state structure of SrGe2 is 5.08 g/cm³.
How many polymorphs of SrGe2 are known?
19 structures of SrGe2 are reported across 3 databases, spanning 7 distinct space groups.
What elements does SrGe2 contain?
SrGe2 contains Ge and Sr (2 elements).
Where does the data for SrGe2 come from?
SrGe2 data is cross-referenced from materials_project, mpaloe, jarvis.
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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