Metallization pressure is the pressure required for a
non-metallic chemical element to become a
metal
A metal (from Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typicall ...
. Every material is predicted to turn into a metal if the pressure is high enough, and temperature low enough.
The value for arsenic refers to pressurizing metastable black arsenic; grey arsenic, the standard state, is already a metallic conductor at standard conditions.
The metallization pressures for fluorine and radon have never been experimentally measured. For fluorine, 2020 calculations predict metallization at 25000 Mbar.
See also
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Metallic hydrogen
Metallic hydrogen is a phase of hydrogen in which it behaves like an electrical conductor. This phase was predicted in 1935 on theoretical grounds by Eugene Wigner and Hillard Bell Huntington.
At high pressure and temperatures, metallic hydroge ...
References
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Physical chemistry
Allotropes