GeO2 (germanium dioxide) is an inorganic ceramic compound belonging to the oxide ceramics family, characterized by a tetrahedral crystal structure similar to silica. It is primarily used in optics and photonics applications, particularly as a core material in optical fibers and infrared optical components, where its high refractive index and transparency in the infrared spectrum provide advantages over conventional silica-based alternatives. GeO2 is also investigated for applications in nuclear fuel matrices, solid electrolytes for energy storage, and as a dopant in specialty optical fibers; engineers select it when superior infrared transmission, high refractive index contrast, or radiation resistance is critical to device performance.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 37.51 | GPa | — | ||
| ↳ | 37.73 | GPa | — | ||
| ↳ | 42.86 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.4090 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν)2 entries | 0.2100 | - | — | ||
| ↳ | 0.2600 | - | — | ||
Shear Modulus(G)3 entries | 26.93 | GPa | — | ||
| ↳ | 27.33 | GPa | — | ||
| ↳ | 25.51 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 4.223 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 5.540 | eV | — | ||
| ↳ | 3.245 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 6.360 | - | — | ||
| ↳ | 6.729 | - | — | ||
| ↳ | 4.817 range 3.210–6.424median of 2 measurements | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij)2 entries | 0.1625 | C/m² | — | ||
| ↳ | 0.2653 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — | ||
Seebeck Coefficient(S) | -121.1 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.1013 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -1.932 | eV/atom | — | ||
| ↳ | -1.677 | eV/atom | — |