Ca4Ge4Sr4
Ca4Ge4Sr4 is a thermodynamically stable semiconducting ternary intermetallic compound containing calcium, germanium, and strontium.
About Ca4Ge4Sr4
Ca4Ge4Sr4 is a complex intermetallic compound composed of calcium, germanium, and strontium. As a thermodynamically stable phase located on the convex hull, it represents a well-defined structural arrangement within this ternary system.
This material exhibits semiconducting electronic character, making it an interesting subject for fundamental research into electronic structure and transport properties. Its stability suggests potential robustness in specialized material synthesis and solid-state applications.
Key Properties
Cross-validated computational properties for Ca4Ge4Sr4, 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 Ca4Ge4Sr4, 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. |
|---|---|---|---|---|---|
| Pnma (No. 62) | orthorhombic | 0.44 | 0.0000 | -12.727 | 3.62 |
| Pnma (No. 62) | — | — | — | — | — |
| — | — | — | — | — | 3.58 |
Frequently Asked Questions
Common questions about Ca4Ge4Sr4, answered from cross-validated data.
What is Ca4Ge4Sr4?
Ca4Ge4Sr4 is a thermodynamically stable semiconducting ternary intermetallic compound containing calcium, germanium, and strontium.
What is the band gap of Ca4Ge4Sr4?
Is Ca4Ge4Sr4 a metal, semiconductor, or insulator?
Is Ca4Ge4Sr4 thermodynamically stable?
What is the crystal structure of Ca4Ge4Sr4?
What is the density of Ca4Ge4Sr4?
How many polymorphs of Ca4Ge4Sr4 are known?
What elements does Ca4Ge4Sr4 contain?
Where does the data for Ca4Ge4Sr4 come from?
How It Compares
As a unique ternary phase within the calcium-germanium-strontium system, Ca4Ge4Sr4 serves as a distinct structural reference point. Without direct structural siblings in this specific class, it stands as a primary example of how alkaline earth metals can stabilize germanium-based frameworks in complex stoichiometric ratios.
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).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
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