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Reports on a family of zeolite-type materials that possess two independent sets of three-dimensional cross-linked helical pores, separated by a gyroid periodic minimal surface. Stimulation of research into the preparation of heterogeneous chiral catalysts of separation media that combine both shape selectivity and enantinoselectivity, by the increasing demand for enantimerically pure chemicals; Findings.

Reports on the synthesis of the solid solution series GaxZ(8-x)PxSe(2-x)[BO2]12(x=0,0.5,1,2). Local and average long-range structures; Presence of four different intracage structures distributed in small domains throughout the powdered materials; Conclusion that the materials are single phase solid solutions.