A linear DABCO templated fluorogallophosphate: synthesis and structure determination from powder diffraction data of Ga(PO4H)2F·[N2C6H14]

A new 1D fluorogallophosphate, Ga(PO4H)2F[N2C6H14], was synthesized solvothermally using 1,4-diazabicyclo[2.2.2]octane (DABCO) as a templating agent. The structure was determined ab initio from X-ray powder diffraction data. It crystallizes in the orthorhombic space group P212121, with a = 14.8725(9) Å, b = 12.0132(7) Å, c = 7.0700(6) Å, V = 1263 Å3 and Z = 4. The 1D structure contains discrete inorganic chains built-up by fluorine sharing GaO4F2 octahedra, corner linked by bridging PO4H tetrahedra. These chains, similar to those found in tancoite type minerals, are linked to each other via hydroxy groups and via hydrogen bonding with the ammonium groups of the doubly protonated DABCO molecules.