HI
Hydrogen iodide · Hydriodic acid
Hydrogen iodide is a stable, insulating binary compound of hydrogen and iodine widely utilized as a chemical reagent.
About Hydrogen iodide
Hydrogen iodide is a binary inorganic compound composed of hydrogen and iodine. It functions as a wide-gap insulator, exhibiting electronic characteristics typical of stable molecular halides that are well-represented in structural databases.
Due to its position near the thermodynamic hull, this compound is considered a viable and synthesizable material. Its chemical nature makes it a significant reagent in various synthetic pathways, particularly in organic chemistry and specialized industrial processes.
Key Properties
Cross-validated computational properties for Hydrogen iodide, aggregated across 5 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.
Applications
Where Hydrogen iodide is used.
Frequently Asked Questions
Common questions about Hydrogen iodide, answered from cross-validated data.
What is HI?
Hydrogen iodide is a stable, insulating binary compound of hydrogen and iodine widely utilized as a chemical reagent.
What is HI used for?
What is the band gap of HI?
Is HI a metal, semiconductor, or insulator?
Is HI thermodynamically stable?
How many polymorphs of HI are known?
What elements does HI contain?
Where does the data for HI come from?
How It Compares
As a fundamental binary halide, hydrogen iodide serves as a foundational reference point for understanding the behavior of hydrogen-based acidic gases. It occupies a distinct role in chemical synthesis, providing a unique reactivity profile that differentiates it from other simple hydrogen halides.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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