Host-guest behavior in a nitrido-sodalite is reported for the first time. The novel nitrido-sodalite Zn-6[P12N24] has the usual nitrido-sodalite structure with PN4 corner-sharing units, as shown in the Figure, except that the central anion and one quarter of the Zn2+ ions are absent, producing only partial filling of the beta-cages. Hydrogen encapsulation in the beta-cages is discussed.