Li2Hf2O5
This compound is a complex lithium hafnium oxide ceramic material. It is primarily studied for its structural properties and potential utility in advanced materials research.
Overview
Key Properties
Cross-validated computational properties for Li2Hf2O5, 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.
3.81–4.35 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.
0.080 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.
Metastable
2 DFT sources
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
6
3 databases, 2 space groups
Crystallography
Reported Structures
Lowest-energy structures reported for Li2Hf2O5, 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 | 4.35 | 0.0803 | -8.759 | 7.31 |
| P21/c (No. 14) | monoclinic | 3.81 | 0.0973 | -8.742 | 6.87 |
| C2/c (No. 15) | Monoclinic | — | — | — | 7.31 |
| C2/c (No. 15) | Monoclinic | — | — | — | 7.74 |
| C2/c (No. 15) | Monoclinic | — | — | — | 7.51 |
| C2/c (No. 15) | — | — | — | — | — |
Uses
Applications
Where Li2Hf2O5 is used.
Materials science researchSolid-state chemistry studies
Reference
Frequently Asked Questions
Common questions about Li2Hf2O5, answered from cross-validated data.
What is Li2Hf2O5?
This compound is a complex lithium hafnium oxide ceramic material. It is primarily studied for its structural properties and potential utility in advanced materials research.
More questions
What is Li2Hf2O5 used for?
Li2Hf2O5 is used in materials science research and solid-state chemistry studies.
What is the band gap of Li2Hf2O5?
Li2Hf2O5 has a DFT-computed band gap of 3.81–4.35 eV across 6 reported structures.
Is Li2Hf2O5 a metal, semiconductor, or insulator?
With a wide band gap up to 4.35 eV it is an insulator / wide-band-gap material.
Is Li2Hf2O5 thermodynamically stable?
Li2Hf2O5 has a lowest energy above hull of 0.080 eV/atom (metastable).
What is the crystal structure of Li2Hf2O5?
The lowest-energy reported polymorph of Li2Hf2O5 is monoclinic symmetry, space group C2/c (No. 15).
What is the density of Li2Hf2O5?
The computed density of the ground-state structure of Li2Hf2O5 is 7.31 g/cm³.
How many polymorphs of Li2Hf2O5 are known?
6 structures of Li2Hf2O5 are reported across 3 databases, spanning 2 distinct space groups.
What elements does Li2Hf2O5 contain?
Li2Hf2O5 contains Hf, Li, and O (3 elements).
Where does the data for Li2Hf2O5 come from?
Li2Hf2O5 data is cross-referenced from materials_project, mpaloe, jarvis.
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Related Compounds
Other Lithium Oxides in the database.
Data sources & attribution
- materials_project — Data from the Materials Project. Cite: Jain et al., APL Materials 1, 011002 (2013).
- mpaloe — Data from mpaloe.
- jarvis — Data from JARVIS (NIST). Cite: Choudhary et al., npj Comp. Mater. 6, 173 (2020).
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