Abstract
Abstract An ammonium beryllophosphate (BeP-MER1) with the merlinoite framework topology has been made by the hydrothermal synthesis. Similar to the mineral merlinoite, BeP-MER1 belongs to the orthorhombic space group, but its unit cell is metrically tetragonal. The framework of a merlinoite structure such as BeP-MER1 can be viewed as the body-centered tetragonal packing of double 8-rings or the stacking of 4.8.8 nets along the c-axis. BeP-MER1 has three-dimensional, intersecting 8-ring channels along the crystallographic [001], [110] and [110] directions. The sites of extra-framework species are located, but the distribution of H2O and NH+4 among these sites are not unambiguously determined. A summary of beryllophosphate zeolite structures provides an interesting comparison among hydrous and anhydrous alkali metal templated beryllophosphate phases.
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