OXYFLUORINATED COMPOUNDS WITH OPEN STRUCTURES .15. SYNTHESIS AND CRYSTAL-STRUCTURE OF ULM-13, A NEW LAYERED FLUOROALUMINOPHOSPHATE TEMPLATED WITH 1,6-DIAMINOHEXANE - AL-4(PO4)(3)(HPO4)F-6, (N2C6H18)(2.5), 3H2O

ULM-13, formulated Al-4(PO4)(3)(HPO4)F-6, (N2C6H18)(2.5), 3 H2O, is a new layered fluoroaluminophosphate obtained by hydrothermal synthesis using 1,6-diaminohexane as a template. It crystallizes in the orthorho mbic space group Pnma, a = 9.501(2) Angstrom, b = 14.140(2) Angstrom, c = 27.057(4) Angstrom, V = 3634.95 Angstrom(3), Z = 4, rho(m) = 1.74 g cm(-3). The refinement of data leads to R = 0.056 for 3562 independe nt reflections. The structure is built up from macroanionic sheets in which (PO4) tetrahedra share all their vertices with three (AlO4F2) oc tahedra and one (AlO3F) tetrahedron. Protonated 1,6-diaminohexane and water molecules are interleaved between the sheets. The organic molecu les exhibit two orientations: either perpendicular to the inorganic sh eets or in an oblique configuration, the latter exhibiting disorder in the alkyl chain. (C) 1995 Academic Press, Inc