GeS2
Germanium disulfide · Germanium sulfide
Germanium disulfide is a crystalline inorganic compound that serves as a key material in the field of chalcogenide glasses. It is primarily utilized for its unique optical properties, making it a valuable component in the development of infrared-transmitting materials and advanced optical devices.
Key Properties
Cross-validated computational properties for Germanium disulfide, aggregated across 4 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.
Cross-Source DFT Agreement
How well independent DFT databases agree on the thermodynamics of GeS2. Tight agreement means computed properties can be trusted without re-running calculations.
Agreement ScoreA normalized confidence score summarizing how closely independent DFT databases agree. Higher scores mean tighter cross-source agreement.
Hull SpreadDifference between the highest and lowest energy-above-hull values reported by comparable sources. Smaller spread means less thermodynamic disagreement.
Sources ComparedNumber and names of computational sources with comparable entries for this formula.
Space Group ConsensusWhether independent sources predict the same crystal symmetry for the lowest-energy structure.
Reported Structures
Lowest-energy structures reported for GeS2, 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. |
|---|---|---|---|---|---|
| P21/c (No. 14) | monoclinic | 2.26 | 0.0000 | -4.963 | 2.77 |
| Pc (No. 7) | monoclinic | 2.84 | 0.0001 | -10.371 | 2.85 |
| Fdd2 (No. 43) | orthorhombic | 2.25 | 0.0034 | -4.959 | 2.84 |
| Pc (No. 7) | monoclinic | 2.23 | 0.0076 | -4.955 | 2.80 |
| I41/acd (No. 142) | tetragonal | 2.14 | 0.0155 | -4.947 | 2.98 |
| I-42d (No. 122) | tetragonal | 2.60 | 0.0176 | -4.945 | 3.13 |
| P1 (No. 1) | triclinic | 2.15 | 0.0181 | -4.945 | 2.71 |
| P42/nmc (No. 137) | tetragonal | 0.96 | 0.0550 | -4.908 | 3.28 |
| Pm (No. 6) | Monoclinic | — | — | — | 3.27 |
| No. 0 | unknown | — | — | — | 0.18 |
| P2/m (No. 10) | Monoclinic | — | — | — | 3.39 |
| Cc (No. 9) | Monoclinic | — | — | — | 2.80 |
Synthesis Routes
Literature-extracted synthesis procedures targeting GeS2.
Applications
Where Germanium disulfide is used.
Frequently Asked Questions
Common questions about Germanium disulfide, answered from cross-validated data.
What is GeS2?
Germanium disulfide is a crystalline inorganic compound that serves as a key material in the field of chalcogenide glasses. It is primarily utilized for its unique optical properties, making it a valuable component in the development of infrared-transmitting materials and advanced optical devices.
What is GeS2 used for?
What is the band gap of GeS2?
Is GeS2 a metal, semiconductor, or insulator?
Is GeS2 thermodynamically stable?
What is the crystal structure of GeS2?
What is the density of GeS2?
How many polymorphs of GeS2 are known?
How is GeS2 synthesized?
What elements does GeS2 contain?
Where does the data for GeS2 come from?
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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