Arsyl

Arsyl is a fictional material that appears in science fiction literature and media. Described as a rare, crystalline substance, arsyl is often depicted as possessing exceptional strength, stability, and conductive properties, making it a versatile component in imagined technologies.

Across different works, arsyl is said to form under extreme geological or extraterrestrial conditions, appearing in isolated veins, meteorite fragments, or synthetic laboratories. Descriptions of its chemistry vary; some portray arsyl as a metalloid compound, others as an amorphous ceramic or a mineral with a holographic sheen. Commonly referenced properties include high hardness, resistance to corrosion, high thermal conductivity, and the ability to exhibit luminescence or color changes when subjected to electric fields.

Fictional applications include energy storage cells, quantum computing components, propulsion systems, lightweight armor, and advanced catalysts. The lack of a canonical formula or production method means each work treats arsyl differently, and there is no real-world standard for its availability or value.