InSe2

InSe2 is a metallic indium selenide compound known for its structural complexity and metastable nature.

InSe
Crystal structure of InSe2
Ground-state structure · Materials Project
Overview

About InSe2

InSe2 is a metallic indium selenide compound characterized by a significant degree of structural complexity. Given its status as a metallic phase, it exhibits distinct electronic behavior compared to more common semiconducting chalcogenides, making it a subject of interest for fundamental materials science studies.

Because it resides above the thermodynamic hull, this compound is considered metastable, which presents unique challenges for synthesis and characterization. Its presence across multiple structural databases highlights its role as a notable, albeit elusive, member of the indium-selenium binary system.

At a glance

Key Properties

Cross-validated computational properties for InSe2, aggregated across 4 databases.

Band Gap

Metallic / not reported

Energy Above Hull

0.173 eV/atom
Best (lowest) across sources

Stability

Above hull
2 DFT sources

Structures

50
4 databases, 16 space groups
Validation

Cross-Source DFT Agreement

How well independent DFT databases agree on the thermodynamics of InSe2. Tight agreement means computed properties can be trusted without re-running calculations.

Agreement Score

1.00 / 1.00
Trust tier: medium

Hull Spread

0.000 eV
EAH spread across sources

Sources Compared

2
jarvis, materials_project

Space Group Consensus

All match
Synthesis

Synthesis Routes

Literature-extracted synthesis procedures targeting InSe2.

Sol Gel
Procedure available · ceder_sol_gel
Solid State
Procedure available · ceder_solid_state
Solid State
Procedure available · ceder_solid_state
Uses

Applications

Where InSe2 is used.

Fundamental materials science researchSolid-state chemistry studiesExploratory electronic materials development
Reference

Frequently Asked Questions

Common questions about InSe2, answered from cross-validated data.

What is InSe2?

InSe2 is a metallic indium selenide compound known for its structural complexity and metastable nature.

More questions
What is InSe2 used for?
InSe2 is used in fundamental materials science research, solid-state chemistry studies, and exploratory electronic materials development.
What is the band gap of InSe2?
InSe2 is computed to be metallic (no band gap) in the reported DFT structures.
Is InSe2 a metal, semiconductor, or insulator?
Computed band structures report no gap, so it is metallic.
Is InSe2 thermodynamically stable?
InSe2 has a lowest energy above hull of 0.173 eV/atom (above hull).
How many polymorphs of InSe2 are known?
50 structures of InSe2 are reported across 4 databases, spanning 16 distinct space groups.
How is InSe2 synthesized?
Literature-reported routes for InSe2 include sol gel, solid state (3 procedures documented).
What elements does InSe2 contain?
InSe2 contains In and Se (2 elements).
Where does the data for InSe2 come from?
InSe2 data is cross-referenced from latticegraph.
Comparison

How It Compares

As a metallic phase within the indium-selenium system, InSe2 occupies a unique niche, differing significantly from the more stable, semiconducting indium selenide variants that dominate the literature. It serves as a prime example of the structural variety possible in metal-chalcogenide systems where multiple atomic arrangements can compete for stability.

Data sources & attribution
  • latticegraph — Lattice Graph Materials Intelligence Platform

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