HW
HW is a metallic hydrogen-tungsten compound that exhibits diverse structural forms despite being thermodynamically unstable.
About HW
HW is a metallic compound composed of hydrogen and tungsten. As a material that exhibits metallic electronic character, it is characterized by the absence of a band gap, allowing for efficient electron mobility within its structure. The compound is notable for its structural diversity, appearing in hundreds of reported configurations across multiple databases. Despite this structural richness, it exists in a metastable state above the thermodynamic hull, suggesting that its formation and persistence are highly sensitive to specific synthesis conditions.
Key Properties
Cross-validated computational properties for HW, aggregated across 4 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.
Frequently Asked Questions
Common questions about HW, answered from cross-validated data.
What is HW?
HW is a metallic hydrogen-tungsten compound that exhibits diverse structural forms despite being thermodynamically unstable.
What is the band gap of HW?
Is HW a metal, semiconductor, or insulator?
Is HW thermodynamically stable?
How many polymorphs of HW are known?
What elements does HW contain?
Where does the data for HW come from?
How It Compares
As a unique binary system, HW serves as a fundamental subject for studying the interaction between light elements and transition metals. Without established structural siblings in this specific class, it represents a distinct point of interest for researchers investigating the limits of hydride stability and the electronic behavior of tungsten-based metallic phases.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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