Preparation of Two Cobalt-Substituted Zincophosphate Molecular Sieves

Abstract

Two different open-framework cobalt-zincophosphate phases crystallise from the same reaction mixture at ambient conditions depending on the preparative procedure. One of them is a sodalite analogue containing up 70 8 wt.% of incorporated cobalt(II), in proportion to a molar fraction of cobalt(II) component in the reaction mixture. The other is anovel hexagonal phase with a three-dimensional tetrahedral framework structure containing one-dimensional six-ring channels. A helix built up of sodium cations and water molecules has been found inside the channel.