We study the properties of the electrons produced by absorbing sodium
atoms into a zeolite which we call dry sodalite. Upon absorption, the
sodium atom is ionized and the electron is shared with the other ions
present in the sodalite cage. When the dry sodalite is saturated with
sodium, each cage has one such electron and the system is periodic. We
develop a simple model for the electron interaction with the zeolite
framework and calculate the energy bands of the electrons in this peri
odic system. We find that in the one-electron approximation, the syste
m is a narrow band metal. It is very likely that the electron-electron
interactions will transform it into a Mott insulator which is antifer
romagnetic at low temperature. Particular attention is paid to underst
anding how the interactions between the electrons and the zeolite fram
e affect the electronic properties. Since the properties of the framew
ork can be modified chemically, this understanding can help us determi
ne how to use such modifications to our advantage.