VGe2
VGe2 has a DFT band gap of Metallic / not reported across 53 reported structures in 17 space groups; its lowest-energy polymorph is hexagonal (P6222 (No. 180)). Cross-validated across 3 computational databases.
At a glance
Key Properties
Cross-validated computational properties for VGe2, 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.
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.
0.033 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.
Metastable
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
53
3 databases, 17 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for VGe2, 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. |
|---|---|---|---|---|---|
| P6222 (No. 180) | hexagonal | 0.00 | 0.0326 | -6.279 | 7.52 |
| Cmmm (No. 65) | Orthorhombic | — | — | — | 5.53 |
| Fmmm (No. 69) | Orthorhombic | — | — | — | 6.00 |
| P3m1 (No. 156) | Trigonal | — | — | — | 4.96 |
| P1 (No. 1) | Triclinic | — | — | — | 8.72 |
| Immm (No. 71) | Orthorhombic | — | — | — | 5.98 |
| Immm (No. 71) | Orthorhombic | — | — | — | 7.14 |
| Cmmm (No. 65) | Orthorhombic | — | — | — | 6.79 |
| P3m1 (No. 156) | Trigonal | — | — | — | 5.06 |
| P3m1 (No. 156) | Trigonal | — | — | — | 5.16 |
| P1 (No. 1) | Triclinic | — | — | — | 4.21 |
| Fmm2 (No. 42) | Orthorhombic | — | — | — | 8.33 |
Reference
Frequently Asked Questions
Common questions about VGe2, answered from cross-validated data.
What is the band gap of VGe2?
VGe2 is computed to be metallic (no band gap) in the reported DFT structures.
More questions
Is VGe2 a metal, semiconductor, or insulator?
Computed band structures report no gap, so it is metallic.
Is VGe2 thermodynamically stable?
VGe2 has a lowest energy above hull of 0.033 eV/atom (metastable).
What is the crystal structure of VGe2?
The lowest-energy reported polymorph of VGe2 is hexagonal symmetry, space group P6222 (No. 180).
What is the density of VGe2?
The computed density of the ground-state structure of VGe2 is 7.52 g/cm³.
How many polymorphs of VGe2 are known?
53 structures of VGe2 are reported across 3 databases, spanning 17 distinct space groups.
What elements does VGe2 contain?
VGe2 contains Ge and V (2 elements).
Where does the data for VGe2 come from?
VGe2 data is cross-referenced from materials_project, mpaloe, jarvis.
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Related Compounds
Other A15 Superconductors 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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