Be1Ge1La2
Be1Ge1La2 is a semimetallic ternary intermetallic compound containing beryllium, germanium, and lanthanum.
About Be1Ge1La2
Be1Ge1La2 is a complex ternary compound composed of beryllium, germanium, and lanthanum. Its electronic structure exhibits near-zero-gap characteristics, placing it in the category of semimetallic materials that often bridge the gap between metallic conductors and semiconductors.
Due to its position above the thermodynamic hull, this compound is considered metastable or unstable under standard conditions. Despite this, it remains a subject of interest in structural chemistry, with numerous reported configurations contributing to the broader understanding of ternary phase space.
Key Properties
Cross-validated computational properties for Be1Ge1La2, aggregated across 2 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 Be1Ge1La2, 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. |
|---|---|---|---|---|---|
| Immm (No. 71) | orthorhombic | 0.02 | 2.5761 | -2.483 | 0.54 |
| Pmmm (No. 47) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Cmmm (No. 65) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| Imm2 (No. 44) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| I-4m2 (No. 119) | — | — | — | — | — |
| F-43m (No. 216) | — | — | — | — | — |
| Amm2 (No. 38) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
Frequently Asked Questions
Common questions about Be1Ge1La2, answered from cross-validated data.
What is Be1Ge1La2?
Be1Ge1La2 is a semimetallic ternary intermetallic compound containing beryllium, germanium, and lanthanum.
What is the band gap of Be1Ge1La2?
Is Be1Ge1La2 a metal, semiconductor, or insulator?
Is Be1Ge1La2 thermodynamically stable?
What is the crystal structure of Be1Ge1La2?
What is the density of Be1Ge1La2?
How many polymorphs of Be1Ge1La2 are known?
What elements does Be1Ge1La2 contain?
Where does the data for Be1Ge1La2 come from?
How It Compares
As a unique ternary intermetallic, Be1Ge1La2 represents a specialized case within the landscape of lanthanum-based alloys. Unlike more common, highly stable intermetallics, its metastability suggests a complex formation pathway that requires precise synthesis conditions to access, distinguishing it from more robust, ground-state phases.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- aflow — Data from AFLOW. Cite: Curtarolo et al., Comp. Mater. Sci. 58, 218 (2012).
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