FeSe2
Ferroselite · Iron diselenide
Ferroselite is a naturally occurring iron selenide mineral that belongs to the pyrite group. It is primarily studied for its potential as a semiconductor material and its electrochemical properties in energy storage technologies.
Key Properties
Cross-validated computational properties for Ferroselite, 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 FeSe2, 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. |
|---|---|---|---|---|---|
| Pnnm (No. 58) | orthorhombic | 0.37 | 0.0000 | -5.824 | 7.21 |
| Pa-3 (No. 205) | cubic | 0.02 | 0.0320 | -5.792 | 7.41 |
| P21 (No. 4) | Monoclinic | — | — | — | 4.81 |
| R-3m (No. 166) | Trigonal | — | — | — | 6.15 |
| Pa-3 (No. 205) | Cubic | — | — | — | 7.32 |
| Pa-3 (No. 205) | Cubic | — | — | — | 7.49 |
| P1 (No. 1) | Triclinic | — | — | — | 5.68 |
| Cm (No. 8) | Monoclinic | — | — | — | 8.89 |
| Pnnm (No. 58) | Orthorhombic | — | — | — | 7.33 |
| Pnnm (No. 58) | Orthorhombic | — | — | — | 7.23 |
| Cm (No. 8) | Monoclinic | — | — | — | 4.62 |
| Cm (No. 8) | Monoclinic | — | — | — | 5.72 |
Applications
Where Ferroselite is used.
Frequently Asked Questions
Common questions about Ferroselite, answered from cross-validated data.
What is FeSe2?
Ferroselite is a naturally occurring iron selenide mineral that belongs to the pyrite group. It is primarily studied for its potential as a semiconductor material and its electrochemical properties in energy storage technologies.
What is FeSe2 used for?
What is the band gap of FeSe2?
Is FeSe2 a metal, semiconductor, or insulator?
Is FeSe2 thermodynamically stable?
What is the crystal structure of FeSe2?
What is the density of FeSe2?
How many polymorphs of FeSe2 are known?
What elements does FeSe2 contain?
Where does the data for FeSe2 come from?
Related Compounds
Other Iron-Based Superconductors 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.
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