Ca1Rh2Sb1
Ca1Rh2Sb1 is a semimetallic ternary intermetallic compound containing rhodium, calcium, and antimony, utilized primarily in materials research.
About Ca1Rh2Sb1
Ca1Rh2Sb1 is a complex intermetallic compound categorized within the platinum-group alloy catalysts. Characterized by a near-zero-gap electronic structure, it exhibits semimetallic behavior that is of significant interest for fundamental studies in condensed matter physics and catalysis. Its structural complexity is underscored by a diverse range of reported configurations within material databases. As a material residing above the thermodynamic hull, Ca1Rh2Sb1 represents a metastable phase that requires precise synthesis conditions to stabilize. Its unique composition of calcium, rhodium, and antimony positions it as a specialized candidate for research into electronic tuning and surface-active catalytic processes.
Key Properties
Cross-validated computational properties for Ca1Rh2Sb1, 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 Ca1Rh2Sb1, 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 | 2.5322 | -3.271 | 0.63 |
| R-3m (No. 166) | — | — | — | — | — |
| Cm (No. 8) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| P4mm (No. 99) | — | — | — | — | — |
| Fm-3m (No. 225) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| I4/mmm (No. 139) | — | — | — | — | — |
| P4/mmm (No. 123) | — | — | — | — | — |
| Pmmm (No. 47) | — | — | — | — | — |
Applications
Where Ca1Rh2Sb1 is used.
Frequently Asked Questions
Common questions about Ca1Rh2Sb1, answered from cross-validated data.
What is Ca1Rh2Sb1?
Ca1Rh2Sb1 is a semimetallic ternary intermetallic compound containing rhodium, calcium, and antimony, utilized primarily in materials research.
What is Ca1Rh2Sb1 used for?
What is the band gap of Ca1Rh2Sb1?
Is Ca1Rh2Sb1 a metal, semiconductor, or insulator?
Is Ca1Rh2Sb1 thermodynamically stable?
What is the crystal structure of Ca1Rh2Sb1?
What is the density of Ca1Rh2Sb1?
How many polymorphs of Ca1Rh2Sb1 are known?
What elements does Ca1Rh2Sb1 contain?
Where does the data for Ca1Rh2Sb1 come from?
How It Compares
Within the platinum-group alloy catalysts class.
Within the diverse class of platinum-group alloys, Ca1Rh2Sb1 stands out for its specific combination of alkaline-earth and pnictogen components compared to more traditional binary systems like LaRh or binary pnictides like As2Pt. While many siblings in this group are optimized for structural robustness, this compound is notable for its metastable nature, reflecting the delicate balance of bonding interactions inherent in its ternary lattice compared to the more common binary intermetallics.
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).
Analyze Ca1Rh2Sb1 in the Lattice Graph platform
Polymorph comparison, confidence scoring, supply-chain risk, and patent monitoring — across 53 integrated data sources.
Explore the Platform →