SrTePd
SrTePd is a semiconducting ternary alloy containing strontium, tellurium, and palladium that exists in a metastable state.
About SrTePd
SrTePd is a complex ternary compound categorized within the platinum-group alloy catalysts. As a semiconducting material, it represents a unique intersection of rare-earth elements and noble metals, offering distinct electronic properties that differentiate it from standard metallic alloys. Its structural diversity is highlighted by multiple reported configurations across various databases. Despite its classification, the compound is characterized as being above the thermodynamic hull, suggesting it is a metastable phase that requires specific synthesis conditions to stabilize. This metastability is a key focus for researchers investigating phase transitions and the limits of structural formation in ternary palladium-based systems.
Key Properties
Cross-validated computational properties for SrTePd, 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.
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 SrTePd, 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. |
|---|---|---|---|---|---|
| F-43m (No. 216) | cubic | 0.67 | 0.2601 | -4.380 | 6.43 |
| F-43m (No. 216) | — | — | — | — | — |
| P1 (No. 1) | Triclinic | — | — | — | 4.95 |
| Cm (No. 8) | Monoclinic | — | — | — | 5.47 |
| Cm (No. 8) | Monoclinic | — | — | — | 5.55 |
Applications
Where SrTePd is used.
Frequently Asked Questions
Common questions about SrTePd, answered from cross-validated data.
What is SrTePd?
SrTePd is a semiconducting ternary alloy containing strontium, tellurium, and palladium that exists in a metastable state.
What is SrTePd used for?
What is the band gap of SrTePd?
Is SrTePd a metal, semiconductor, or insulator?
Is SrTePd thermodynamically stable?
What is the crystal structure of SrTePd?
What is the density of SrTePd?
How many polymorphs of SrTePd are known?
What elements does SrTePd contain?
Where does the data for SrTePd come from?
How It Compares
Within the platinum-group alloy catalysts class.
Within the diverse family of platinum-group alloys, SrTePd occupies a niche position compared to more stable or common binary phases like BaPd or GeRu. While many members of this class exhibit robust thermodynamic stability, SrTePd is notable for its metastable nature, distinguishing it from the more readily synthesized or naturally occurring intermetallic compounds in the group.
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).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
- mpaloe — Data from mpaloe.
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