Abstract
Appropriate spectral-moment theory applied to the optical absorption spectrum of the electride electrons in Cs+· (18-crown-6)2·e− shows that their spatial distribution must be considerably more extended than the trapping regions recently ascribed to them on the basis of the crystal structure, optical, electrical and magnetic properties of the electride. The actual regions occupied by the electride electrons appear to encompass appreciable portions of the 18-crown-6 molecules that surround the designated trapping regions.