Cathodochromic behavior of iron‐doped sodalites containing Br, I, or mixtures of halogens has been investigated in addition to that of chloride sodalite. Ultraviolet excitation of these materials produces an optically bleachable absorption band whose peak moves from 5250 to 6025Aå as the halogen composition is changed from Cl to I. Electron beam excitation produces nearly identical absorption, but exposures above a certain threshold produce, in addition to optically bleachable absorption, residual absorption that is insensitive to light. Residual absorption is at a minimum in iodide sodalite.