Dy8O20Si4
Dysprosium silicate
Dysprosium silicate is a rare-earth metal compound that functions as a dielectric material. It is primarily investigated for its potential to replace traditional insulating layers in advanced semiconductor devices.
DyOSi
Overview
Key Properties
Cross-validated computational properties for Dy8O20Si4, 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.
4.35–4.91 eV
Range across DFT structures
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.
0.000 eV/atom
Best (lowest) across sources
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.
On hull (stable)
1 DFT source
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
7
3 databases, 4 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for Dy8O20Si4, 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. |
|---|---|---|---|---|---|
| C2/c (No. 15) | monoclinic | 4.67 | 0.0000 | -8.740 | 6.77 |
| P21/c (No. 14) | monoclinic | 4.91 | 0.0228 | -8.717 | 7.02 |
| Pnma (No. 62) | orthorhombic | 4.35 | 0.0815 | -8.658 | 7.09 |
| — | — | — | — | — | 7.03 |
| No. 0 | unknown | — | — | — | 0.83 |
| No. 0 | unknown | — | — | — | 0.83 |
| — | — | — | — | — | 6.37 |
Uses
Applications
Where Dy8O20Si4 is used.
Semiconductor manufacturingGate dielectricsElectronic component research
Reference
Frequently Asked Questions
Common questions about Dy8O20Si4, answered from cross-validated data.
What is Dy8O20Si4?
Dysprosium silicate is a rare-earth metal compound that functions as a dielectric material. It is primarily investigated for its potential to replace traditional insulating layers in advanced semiconductor devices.
More questions
What is Dy8O20Si4 used for?
Dy8O20Si4 is used in semiconductor manufacturing, gate dielectrics, and electronic component research.
What is the band gap of Dy8O20Si4?
Dy8O20Si4 has a DFT-computed band gap of 4.35–4.91 eV across 7 reported structures.
Is Dy8O20Si4 a metal, semiconductor, or insulator?
With a wide band gap up to 4.91 eV it is an insulator / wide-band-gap material.
Is Dy8O20Si4 thermodynamically stable?
Yes — Dy8O20Si4 sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
What is the crystal structure of Dy8O20Si4?
The lowest-energy reported polymorph of Dy8O20Si4 is monoclinic symmetry, space group C2/c (No. 15).
What is the density of Dy8O20Si4?
The computed density of the ground-state structure of Dy8O20Si4 is 6.77 g/cm³.
How many polymorphs of Dy8O20Si4 are known?
7 structures of Dy8O20Si4 are reported across 3 databases, spanning 4 distinct space groups.
What elements does Dy8O20Si4 contain?
Dy8O20Si4 contains Dy, O, and Si (3 elements).
Where does the data for Dy8O20Si4 come from?
Dy8O20Si4 data is cross-referenced from materials_project, omat24, cod.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- omat24 — Data from OMat24 (Meta FAIR). Cite: Barroso-Luque et al., arXiv 2410.12771 (2024).
- cod — Data from the Crystallography Open Database. Cite: Grazulis et al., Nucleic Acids Res. 40, D420 (2012).
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