1ST CRYSTALLINE ELECTRIDE REVISITED - NEW MAGNETIC-SUSCEPTIBILITY STUDIES OF CS+(18-CROWN-6)2E-

Samples of the electride, Cs+(18-crown-6)2e-, with the previously published structure, are antiferromagnetic with a maximum magnetic susceptibility at about 50 K and with a stoichiometric number of trapped electrons. Allowing the temperature to increase above about 230 K changes the susceptibility to Curie-Weiss behavior with a Weiss constant of only -2.3 K but with retention of a nearly stoichiometric number of trapped electrons. The overall magnetic behavior is different from that found in previous studies, which characterized this electride as a Curie-Weiss paramagnet with up to about 80% of the expected unpaired spins. The difference is tentatively attributed to the presence of excess cesium in the previously studied samples. The earlier behavior could be reproduced by preparing samples by the previous technique.