Ag1Cu1Mg2
Ag1Cu1Mg2 is a semiconducting ternary intermetallic compound that is thermodynamically unstable.
About Ag1Cu1Mg2
Ag1Cu1Mg2 is a ternary intermetallic compound composed of silver, copper, and magnesium. It exhibits semiconducting electronic behavior, which distinguishes it from many purely metallic alloys in this compositional space. Given its complex structural profile, it represents an interesting subject for researchers investigating electronic properties in multi-element systems.
This compound is currently characterized as being thermodynamically unstable relative to the ground state. While it has been identified across multiple structural arrangements, its position above the stability hull suggests that it may be difficult to synthesize or maintain under standard equilibrium conditions.
Key Properties
Cross-validated computational properties for Ag1Cu1Mg2, 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 Ag1Cu1Mg2, 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 | 0.21 | 1.3958 | -1.325 | 0.37 |
| P4mm (No. 99) | — | — | — | — | — |
| Cmm2 (No. 35) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Imm2 (No. 44) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| I-4m2 (No. 119) | — | — | — | — | — |
| C2/m (No. 12) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
Frequently Asked Questions
Common questions about Ag1Cu1Mg2, answered from cross-validated data.
What is Ag1Cu1Mg2?
Ag1Cu1Mg2 is a semiconducting ternary intermetallic compound that is thermodynamically unstable.
What is the band gap of Ag1Cu1Mg2?
Is Ag1Cu1Mg2 a metal, semiconductor, or insulator?
Is Ag1Cu1Mg2 thermodynamically stable?
What is the crystal structure of Ag1Cu1Mg2?
What is the density of Ag1Cu1Mg2?
How many polymorphs of Ag1Cu1Mg2 are known?
What elements does Ag1Cu1Mg2 contain?
Where does the data for Ag1Cu1Mg2 come from?
How It Compares
As a unique ternary phase, Ag1Cu1Mg2 serves as a specialized example of how silver, copper, and magnesium can interact to form semiconducting architectures, standing apart from more common, highly stable binary alloys in this chemical family.
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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