Astatine iodide
# Astatine iodide

Astatine iodide is an interhalogen compound with the chemical formula AtI. It is the second heaviest known interhalogen compound, after iodine tribromide.

## Production

Astatine iodide is produced by the direct combination of astatine and iodine in a 1:1 molar ratio:

    $At_2$ + $I_2$ → 2 AtI
