Au2Hf1Pt1
Au2Hf1Pt1 is a semiconducting ternary alloy composed of gold, hafnium, and platinum that is studied for its unique structural and electronic properties.
About Au2Hf1Pt1
Au2Hf1Pt1 is a complex ternary intermetallic compound belonging to the platinum-group alloy class. Characterized by its semiconducting electronic nature, it represents a unique structural arrangement of gold, hafnium, and platinum atoms that has been documented across multiple crystallographic configurations. While it is currently classified as being above the thermodynamic hull, its existence in structural databases highlights the ongoing interest in exploring the phase space of precious metal alloys. Such materials are frequently investigated for their potential to provide novel catalytic surfaces or specialized electronic properties in advanced technological applications.
Key Properties
Cross-validated computational properties for Au2Hf1Pt1, 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 Au2Hf1Pt1, 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 | 0.41 | 2.7963 | -47.401 | 1.35 |
| C2/m (No. 12) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
| P2/m (No. 10) | — | — | — | — | — |
| Imm2 (No. 44) | — | — | — | — | — |
| Imm2 (No. 44) | — | — | — | — | — |
| R-3m (No. 166) | — | — | — | — | — |
| Pmm2 (No. 25) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
Applications
Where Au2Hf1Pt1 is used.
Frequently Asked Questions
Common questions about Au2Hf1Pt1, answered from cross-validated data.
What is Au2Hf1Pt1?
Au2Hf1Pt1 is a semiconducting ternary alloy composed of gold, hafnium, and platinum that is studied for its unique structural and electronic properties.
What is Au2Hf1Pt1 used for?
What is the band gap of Au2Hf1Pt1?
Is Au2Hf1Pt1 a metal, semiconductor, or insulator?
Is Au2Hf1Pt1 thermodynamically stable?
What is the crystal structure of Au2Hf1Pt1?
What is the density of Au2Hf1Pt1?
How many polymorphs of Au2Hf1Pt1 are known?
What elements does Au2Hf1Pt1 contain?
Where does the data for Au2Hf1Pt1 come from?
How It Compares
Within the platinum-group alloy catalysts class.
Within the diverse family of platinum-group alloys, Au2Hf1Pt1 occupies a distinct position compared to more conventional metallic phases like LaRh or GeRu. While many members of this class exhibit robust metallic conductivity, the semiconducting nature of this compound sets it apart from its peers, suggesting a more complex electronic structure that differentiates it from the simpler binary systems like As2Pt or BaPd.
Related Compounds
Other Platinum-Group Alloy Catalysts in the database.
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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