HfI4
hafnium(IV) iodide · hafnium tetraiodide
Hafnium(IV) iodide is a stable, insulating inorganic halide used primarily as a precursor in the chemical transport and purification of hafnium metal.
About hafnium(IV) iodide
Hafnium(IV) iodide is a thermodynamically stable halide compound characterized by its insulating electronic nature. It serves as a critical intermediate in the chemical processing of transition metals, leveraging its volatility and reactivity to facilitate high-purity material synthesis. The compound is highly regarded for its role in specialized chemical vapor transport applications. Its structural versatility is highlighted by a significant number of reported configurations across various databases, reflecting its importance in inorganic chemistry research.
Key Properties
Cross-validated computational properties for hafnium(IV) iodide, 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.
Applications
Where hafnium(IV) iodide is used.
Frequently Asked Questions
Common questions about hafnium(IV) iodide, answered from cross-validated data.
What is HfI4?
Hafnium(IV) iodide is a stable, insulating inorganic halide used primarily as a precursor in the chemical transport and purification of hafnium metal.
What is HfI4 used for?
What is the band gap of HfI4?
Is HfI4 a metal, semiconductor, or insulator?
Is HfI4 thermodynamically stable?
How many polymorphs of HfI4 are known?
What elements does HfI4 contain?
Where does the data for HfI4 come from?
How It Compares
As a stable binary halide, hafnium(IV) iodide represents a fundamental building block in the study of group four metal halides. It functions as a primary reagent for vapor-phase transport processes, providing a stable pathway for the isolation and refinement of hafnium compared to more complex or less stable halide counterparts.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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